Three hours after she goes to sleep,Shoshanna's heart rate increases,her breathing becomes more rapid,and her eyes move rapidly under her closed lids.Research suggests that Shoshanna is

A) dreaming.
B) emitting delta waves.
C) about to sleepwalk.
D) experiencing a night terror.

Delta Waves

Slow brain waves primarily associated with deep sleep and brain healing.

Dreaming

The experience of envisioned images, sounds, thoughts, or emotions during sleep, particularly REM sleep.

Night Terror

A sleep disorder causing feelings of panic or dread typically occurring during the first few hours of stage 3-4 non-REM sleep; more intense than a nightmare.