单选题 Researchers have come to believe that dreams ______.
【正确答案】 A
【答案解析】[题型分析] 事实细节题 [详细解答] 第一段最后一句“。..can be not only harnessed but actually brought under conscious control,to help us sleep and feel better,...”,这正是选项A所表达的意思,所以正确答案为A。