The in Focus Box Titled "What You Really Want to Know

The In Focus box titled "What You Really Want to Know About Sleep" discusses the topic of sleepwalking, making the point that:

A) in general, it is not dangerous to wake a sleepwalker.
B) because sleepwalkers are always in REM sleep when they walk, it is very easy to wake them.
C) the majority of sleepwalkers do not respond to verbal suggestions, and attempts to guide them back to bed are usually futile.
D) in general, it is very dangerous to try and wake a sleepwalker.