Which conclusion is best supported by the passage?

When we learn something new, the brain does not store it at once in its final form. During sleep, and particularly in its deeper stages, the brain replays the day's experiences and strengthens the connections that matter. Researchers have found that students who sleep after studying often remember more than students who stay awake for the same period. Sleep does not make up for a lack of study, but it helps to fix what has been studied. Staying up all night before an exam may therefore be a poor trade, since the hours gained for study may cost more in lost memory than they give.

Answer and explanation

Correct answer: D. Time spent sleeping can be worth more for exam results than extra study hours taken from it

  1. Step 1: The author says sleep helps fix what has been studied but does not replace study, and that all-night study may cost more in memory than it gives.
  2. Step 2: This supports the idea that lost sleep may cost more than the extra hours are worth.
Answer
Time spent sleeping can be worth more for exam results than extra study hours taken from it.
Why not the others: The passage rejects the idea that sleep replaces study and gives no figure of eight hours or claim of never forgetting.

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Which conclusion is best… | Examen Admisión UNMSM (Peru)