The given passage claims that, when drivers are sleep-deprived, they have poor-self awareness of their resulting behavioral changes.
Note that this is a birzarro question, so it's asking for the one answer choice that does NOT illustrate the principle of the passage.
Answer choice (B) is the correct answer because it is the only answer choice that does not exemplify the principle of altered self-awareness. It reads, "elementary school students who dislike arithmetic are not good judges of whether multiplication tables should be included in the school's curriculum." It is speaking to the students' judgements on the school's curriculum, not on their own abilities to act. This is different than the passage and the other answer choices that comment on altered judgement with regards to one's self-awareness.
Answer choice (C) is incorrect because it illustrates the idea that, when one's conscious state is somehow altered, one loses proper self-awareness and judgement of one's own abilities. This is the same principle illustrated in the passage and the other answer choices, so (C) is not the exception. It may help to think of (C) in comparison to another answer choice, such as (A). The logic in (C) is identical to that of (A), but it substitutes drinking with exposure to noxious fumes and driving with working.
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