单项选择题

In this section you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. Mark the best answer to each question on ANSWER SHEET TWO.
Concerning sleep hygiene, which of the following suggestions is INCORRECT

A. Putting sleep ahead of any other things.
B. Preventing having caffeine after breakfast.
C. Making the bedroom comfortable.
D. Preventing taking a long nap in the day.
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