A.I. Explanation:

Correct answer: unprecendented

Explanation: The word 'unprecendented' fits grammatically as it describes the noun 'ascent,' indicating that Dickens's rise was without previous example. This aligns with the context of his remarkable success in the literary world.

Meaning: 'Unprecendented' means something that has never happened before or has no prior example.

Wrong options:

• fulfilment: 'Fulfilment' is a noun that refers to the achievement of something desired, which does not fit the context of describing an ascent.
• numberless: 'Numberless' is an adjective that means countless or innumerable, but it does not appropriately describe an ascent.
• diffusion: 'Diffusion' is a noun that refers to the spreading of something, which does not relate to the ascent of Dickens's popularity.
• disproved: 'Disproved' is a verb that means to show something is false, which does not fit as it does not describe an ascent.
• undeniably: 'Undeniably' is an adverb that means certainly or without doubt, which does not fit as it does not describe an ascent.
• unauthorized: 'Unauthorized' is an adjective that means not having official permission, which does not relate to the ascent of Dickens's popularity.

Correct answer: disproved

Explanation: The term 'disproved' is a verb that fits grammatically as it indicates an action taken by Dickens to refute a theory. Contextually, it aligns with the narrative of him challenging the notion of fleeting fame.

Meaning: 'Disproved' means to show that something is not true or valid.

Wrong options:

• unauthorized: 'Unauthorized' is an adjective that means not having official permission, which does not fit as it does not describe an action taken by Dickens.
• numberless: 'Numberless' is an adjective that means countless, which does not fit the context of disproving a theory.
• fulfilment: 'Fulfilment' is a noun that refers to the achievement of something, which does not fit as it does not describe an action.
• unprecendented: 'Unprecendented' is an adjective that describes something without prior example, which does not fit as it does not describe an action.
• undeniably: 'Undeniably' is an adverb that means certainly, which does not fit as it does not describe an action.
• diffusion: 'Diffusion' is a noun that refers to the spreading of something, which does not relate to the action of disproving.

Correct answer: undeniably

Explanation: The word 'undeniably' is an adverb that fits grammatically as it modifies the verb 'remained,' emphasizing the certainty of Dickens's status as the most popular novelist. This aligns with the context of his lasting fame.

Meaning: 'Undeniably' means certainly or without doubt.

Wrong options:

• unauthorized: 'Unauthorized' is an adjective that means not having official permission, which does not fit as it does not describe the state of being popular.
• numberless: 'Numberless' is an adjective that means countless, which does not fit as it does not describe the certainty of his popularity.
• fulfilment: 'Fulfilment' is a noun that refers to the achievement of something, which does not fit as it does not describe the state of being popular.
• unprecendented: 'Unprecendented' is an adjective that describes something without prior example, which does not fit as it does not describe the state of being popular.
• disproved: 'Disproved' is a verb that means to show something is false, which does not fit as it does not describe the state of being popular.
• diffusion: 'Diffusion' is a noun that refers to the spreading of something, which does not relate to the certainty of his popularity.

Correct answer: innumerable

Explanation: The word 'innumerable' is an adjective that fits grammatically as it describes the noun 'dramatic adaptations,' indicating that there were countless adaptations of Dickens's works. This aligns with the context of his widespread popularity.

Meaning: 'Innumerable' means too many to be counted; countless.

Wrong options:

• unauthorized: 'Unauthorized' is an adjective that means not having official permission, which does not fit as it does not describe the quantity of adaptations.
• numberless: 'Numberless' is an adjective that means countless, which is similar but does not fit the context as well as 'innumerable.'
• fulfilment: 'Fulfilment' is a noun that refers to the achievement of something, which does not fit as it does not describe the quantity of adaptations.
• unprecendented: 'Unprecendented' is an adjective that describes something without prior example, which does not fit as it does not describe the quantity of adaptations.
• disproved: 'Disproved' is a verb that means to show something is false, which does not fit as it does not describe the quantity of adaptations.
• diffusion: 'Diffusion' is a noun that refers to the spreading of something, which does not relate to the quantity of adaptations.

Correct answer: unauthorized

Explanation: The word 'unauthorized' is an adjective that fits grammatically as it describes the noun 'adaptations,' indicating that these adaptations were made without permission. This aligns with the context of copyright laws being weaker.

Meaning: 'Unauthorized' means not having official permission.

Wrong options:

• innumerable: 'Innumerable' is an adjective that means countless, which does not fit as it does not describe the legality of the adaptations.
• numberless: 'Numberless' is an adjective that means countless, which does not fit as it does not describe the legality of the adaptations.
• fulfilment: 'Fulfilment' is a noun that refers to the achievement of something, which does not fit as it does not describe the legality of the adaptations.
• unprecendented: 'Unprecendented' is an adjective that describes something without prior example, which does not fit as it does not describe the legality of the adaptations.
• disproved: 'Disproved' is a verb that means to show something is false, which does not fit as it does not describe the legality of the adaptations.
• diffusion: 'Diffusion' is a noun that refers to the spreading of something, which does not relate to the legality of the adaptations.