A.I. Explanation:

Correct answer: happiness

Explanation: The word 'happiness' serves as a noun that is the subject of the sentence, fitting grammatically and contextually as it refers to the attainment being discussed. The structure of the sentence indicates that the attainment of happiness is the focus, making 'happiness' the appropriate choice.

Meaning: 'Happiness' refers to a state of well-being and contentment.

Wrong options:

• examined: Examined is a past participle that does not fit as a subject in this context.
• looked: Looked is a past tense verb that does not relate to the subject of attainment.
• aiming: Aiming is a gerund that does not serve as a subject here.
• paradox: Paradox is a noun that does not fit as the subject of the sentence.
• results: Results is a plural noun that does not relate to the concept of happiness in this context.
• looking: Looking is a gerund that does not fit as a subject in this context.

Correct answer: aiming

Explanation: The term 'aiming' is a gerund that functions as the object of the preposition 'at,' fitting grammatically and contextually as it indicates the action we should be engaged in. It aligns with the idea of pursuing something other than happiness.

Meaning: 'Aiming' refers to the act of directing one's efforts or intentions towards a goal.

Wrong options:

• examined: Examined is a past participle that does not fit as an object of the preposition.
• looked: Looked is a past tense verb that does not function as an object in this context.
• happiness: Happiness is a noun that does not fit as an object of the preposition 'at.'
• paradox: Paradox is a noun that does not fit as an object of the preposition.
• results: Results is a plural noun that does not fit as an object in this context.
• looking: Looking is a gerund but does not fit the grammatical structure required here.

Correct answer: examined

Explanation: The word 'examined' is a past participle that fits grammatically as it serves as the main verb in the passive voice construction of the sentence. It indicates that the doctrine is being analyzed, which aligns with the context of discussing its implications.

Meaning: 'Examined' means to have looked at something carefully and in detail.

Wrong options:

• aiming: Aiming is a gerund that does not fit as a verb in this context.
• looked: Looked is a past tense verb that does not fit the passive construction required here.
• happiness: Happiness is a noun and does not serve as a verb in this context.
• paradox: Paradox is a noun that does not fit as a verb in this context.
• results: Results is a plural noun that does not fit as a verb in this context.
• looking: Looking is a gerund that does not fit the grammatical structure required here.

Correct answer: paradox

Explanation: The term 'paradox' is a noun that fits grammatically as it serves as the complement to the verb 'resolves.' It describes the nature of the doctrine being discussed, which is consistent with the context of the sentence.

Meaning: 'Paradox' refers to a statement that contradicts itself but may nonetheless be true.

Wrong options:

• examined: Examined is a past participle that does not fit as a noun in this context.
• looked: Looked is a past tense verb that does not fit as a noun in this context.
• aiming: Aiming is a gerund that does not fit as a noun in this context.
• happiness: Happiness is a noun that does not fit as a complement to the verb 'resolves.'
• results: Results is a plural noun that does not fit as a complement in this context.
• looking: Looking is a gerund that does not fit as a noun in this context.