Bailey Is Hooked Up to an Electroencephalograph (EEG) in a Sleep

Multiple Choice

Bailey is hooked up to an electroencephalograph (EEG) in a sleep lab. She has been asleep for just over an hour now, and her EEG is showing low-amplitude brain-wave patterns. Her breathing and pulse rate are irregular, and her eyes are darting back and forth beneath her closed eyelids. The researcher who is monitoring Bailey's sleep can conclude that Bailey

A) has just entered REM sleep.
B) has just entered stage 4 sleep.
C) is experiencing sleep anoxia and needs immediate medical attention.
D) suffers from a sleep disorder.