Which of the descriptions is not descriptive of REM (rapid eye movement)sleep?

A)Visible movements of the eyes resembling those of one tracking the movements of objects in space,watching TV,and so on
B)Difficulty arousing the sleeper
C)Oxygen consumption decreases by comparison to NREM sleep and in an alert wakeful state.
D)It represents 20-25% of a person's "sleeptime."
E)Skeletal muscle activity is markedly reduced,except for the extraocular and respiratory muscles.