Paragraph Comprehension (PC)Difficulty 2/5
Passage: 'Sleep affects marksmanship more than most recruits expect. In one study, soldiers limited to four hours of sleep missed targets twice as often as rested soldiers, and their reaction times slowed by a third.' What is the main idea?
- ALack of sleep significantly degrades shooting performance
- BReaction time is unrelated to sleep
- CStudies about soldiers are unreliable
- DRecruits should sleep four hours
Show answer and rationale
Correct: A. The first sentence states the claim and the study details support it: sleep loss hurts marksmanship and reaction time.
- D — Four hours is the deprived condition, not a recommendation.
- B — The passage says reaction times slowed.
- C — Nothing questions the study.