Using the DSM-IV categories, which are the most common psychological disorders in the United States?

The deepest point in the sleep cycle, when brain waves activity is the slowest, occurs in

a. Stage 1, about three hours after falling asleep. b. REM sleep, about one hour after falling asleep. c. Stage 4, about a half hour after falling asleep. d. Stage 4, about two hours before waking up. e. REM sleep, about one hour before waking up.

Research studies of how people actually progress through Kübler-Ross's stages of dying suggests that ______ people experience the 5 stages she identified and these 5 stages are _______ experienced in the order she specified

a. all; always b. all; sometimes c. most; always d. most; sometimes