Which Statement Does NOT Accurately Describe REM Sleep

Multiple Choice

Which statement does NOT accurately describe REM sleep

A)  REM sleep is not unique to humans but also occurs in most mammals and birds. 
B)  REM sleep does not occur in dolphins 
C)  REM sleep involves paralysis of the major muscles of the body. 
D)  There is one period during the night in which rapid eye movements are observed in the sleeper, and it is immediately following Stage 4 deep sleep.