问题详情

What is the main idea of the passage？

A．There is little danger of serious after-effects when human beings are deprived of sleep for long periods of time.

B．Going without sleep for a long period will cause bad shortlivede ffects, but apparently no serious after-effects.

C．After 200 hours without sleep Tripp was suffering from "mental ill ness".

D．The doctors predicted Tripp would sleep for twenty or thirty hours.

请帮忙给出正确答案和分析，谢谢！