单选题
What is true of sleepwalking according to the passage?
A、
It is caused by emotional conflict or guilty conscience.
B、
It is the acting out of a vivid dream.
C、
Somnambulists are asleep during their sleepwalking.
D、
It is dangerous to waken a sleepwalker.
【正确答案】
A
【答案解析】
阅读文章我们可以发现，只有A项符合原文。
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