Which of the following is CORRECT about the experiment？A．Sleeping pills made people go int

Which of the following is CORRECT about the experiment？

A．Sleeping pills made people go into REM sleep quickly.

B．People had more dreams after they took sleeping pills.

C．People became angry easily because they didn"t take sleeping pills.

D．Sleeping pills prevented people from going into REM sleep.

请帮忙给出正确答案和分析，谢谢！