A.I. Explanation:

Correct answer: divided

Explanation: The word 'divided' is a past participle that fits grammatically as it describes how human history can be segmented into distinct eras. It aligns with the context of categorizing historical periods, maintaining the sentence's logical flow.

Meaning: 'Divided' means to separate into parts or categories.

Wrong options:

• stepped: 'Stepped' is a past tense verb that implies movement or progression, which does not fit the context of categorizing eras.
• stared: 'Stared' is a past tense verb indicating looking intently, which is irrelevant to the context of dividing history.
• exempted: 'Exempted' is a past participle meaning to be freed from an obligation, which does not relate to the division of historical eras.

Correct answer: outlined

Explanation: The term 'outlined' is the past tense of the verb 'outline,' which fits grammatically as it indicates that McLuhan presented or described the concept in a structured manner. This aligns with the context of discussing his theoretical contributions.

Meaning: 'Outlined' means to give a brief description or summary of something.

Wrong options:

• stepped: 'Stepped' does not fit as it implies physical movement rather than the act of describing a concept.
• stared: 'Stared' is unrelated to the act of presenting ideas and does not fit contextually.
• exempted: 'Exempted' does not relate to the act of outlining a concept and is grammatically incorrect in this context.

Correct answer: released

Explanation: The word 'released' is a past participle that fits grammatically, indicating that the book was made available to the public. This aligns with the context of discussing the publication of McLuhan's work.

Meaning: 'Released' means to make something available or to publish.

Wrong options:

• stepped: 'Stepped' does not fit as it implies movement rather than the act of publishing a book.
• stared: 'Stared' is irrelevant in this context as it does not relate to the publication of a book.
• exempted: 'Exempted' does not apply to the context of releasing a book and is grammatically incorrect.

Correct answer: predicted

Explanation: The term 'predicted' is a past tense verb that fits grammatically, indicating that McLuhan foresaw the emergence of the electronic age. This aligns with the context of discussing his foresight regarding technological changes.

Meaning: 'Predicted' means to say what will happen in the future based on current evidence.

Wrong options:

• stepped: 'Stepped' does not fit as it implies physical movement rather than making a prediction.
• stared: 'Stared' is unrelated to the act of predicting and does not fit contextually.
• exempted: 'Exempted' does not relate to the act of making predictions and is grammatically incorrect.

Correct answer: access

Explanation: The word 'access' fits grammatically as a noun indicating the ability to obtain or make use of information. This aligns with the context of discussing the availability of information in the electronic age.

Meaning: 'Access' means the ability to obtain or make use of something.

Wrong options:

• stepped: 'Stepped' does not fit as it implies movement rather than the ability to obtain information.
• stared: 'Stared' is irrelevant in this context as it does not relate to accessing information.
• exempted: 'Exempted' does not apply to the context of having access to information and is grammatically incorrect.