The best indication that dreaming serves a necessary biological function is provided by the fact that

A) most dreams are psychologically meaningless.
B) the disruption of REM sleep leads to narcolepsy.
C) most mammals experience REM rebound.
D) sexual tension is naturally discharged during REM sleep.

REM Rebound

The phenomenon where a person experiences increased REM sleep after being deprived of REM sleep for a period.

Narcolepsy

A chronic sleep disorder characterized by overwhelming daytime drowsiness and sudden attacks of sleep, often associated with cataplexy and other REM sleep disturbances.

Psychologically Meaningless

Refers to information or stimuli that hold no significant value or relevance to one's mental processes or emotional state.