At the end of the passage, the writer makes it obvious that______.A．sleepwalkers are often

At the end of the passage, the writer makes it obvious that______.

A．sleepwalkers are often awakened by dangers

B．the underlying cause of sleepwalking is more serious than sleepwalking itself

C．most sleepwalkers are deranged or insane

D．most children will fall into habitual sleepwalking behavior. when they grow up

请帮忙给出正确答案和分析，谢谢！