During REM Sleep, Angela Often Sleepwalks

During REM sleep, Angela often sleepwalks. If her parents speak to her, she answers, but in the morning she denies any memory of being up. Assuming Angela is really sleepwalking, this is unusual behaviour for the REM stage of sleep, because

A) the brain waves during REM sleep are always slow.
B) normally, sleep paralysis would keep her in her bed.
C) REM shuts down the verbal centers of the brain.
D) REM is not one of the dreaming stages of sleep.
E) normally, people who sleepwalk remember doing it.