REM Sleep Behavior Disorder

REM sleep behavior disorder:

A) is harmless and usually resolves itself by the time the child reaches his or her teenage years.
B) usually involves feelings of fear or anger during dreams of being chased or attacked by unfamiliar people, animals, or insects.
C) is another term that means the same thing as cataplexy.
D) was a relatively common condition when Sigmund Freud was developing his theories about the meaning of dreams but is almost never seen today.