Which of the following statements is true? A.Only a loud noise can wake you up
Which of the following statements is true?
A.Only a loud noise can wake you up when you are in Stage 2 sleepy.
B.A person can sleepwalk during Stage 3 or Stage 4 sleep.
C.In stage 2, the sleeper's pulse and breathing don't become slower than these during Stage 1.
D.The sleeper can go back to Stage 3 after Stage 4 sleep.