Research on Sleep and Dreaming Fails to Confirm That

Research on sleep and dreaming fails to confirm that

A) the use of sleeping pills reduces REM sleep.
B) increased genital arousal accompanies dreaming regardless of whether the dream's content is sexual.
C) when dreaming of performing an activity,our limbs move in a way that is consistent with the dream.
D) NREM-3 sleep periods become shorter as we progress through a full night of sleep.