What are the researchers at the University of Chicago studying?

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问题 What are the researchers at the University of Chicago studying?
A unique laboratory at the University of Chicago is busy only at night. It is a dream laboratory where researchers are at work studying dreamers. Their findings have revealed that everyone dreams from three to seven times a night, although in ordinary life a person may remember none or only one of his dreams. While the subjects, usually students, are asleep, special machines record their brain waves and eye movements as well as the body movements that signal the end of a dream. Surprisingly, all subjects sleep soundly. Observers report that once the dream has started, one’s body relaxes and his eyes become more active, as if the curtain had gone up on a show. As soon as the machine indicates that the dream is over, a buzzer wakens the sleeper. He sits up, records his dream, and goes back to sleep, perhaps to dream some more. Researchers have found that if the dreamer is wakened immediately after his dream, he can keep the dream. If he is allowed to sleep even five more minutes, his memory of the dream will have faded.

选项 A、Different kinds of dreams.
B、The content of dreams.
C、Dreamers while they dream.

答案C

解析 推理题。根据…researchers are at work studying dreamers.可推断出答案为C。
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