People who cant get to sleep are advised to sleep at______.A.any time in a day as long as

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People who cant get to sleep are advised to sleep at______.

A.any time in a day as long as one wishes

B.the time when one plans to sleep

C.a very early time at night

D.a very late time at night

请帮忙给出正确答案和分析,谢谢!

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