Theresa's Mother and Father Have Come to Visit Her for the Holidays

Theresa's mother and father have come to visit her for the holidays. Unfortunately, her father snores loudly and is keeping her awake. She notices that from time to time his breathing stops completely and then restarts. Her father may have

A) narcolepsy.
B) a REM-sleep behavior disorder.
C) night terrors.
D) sleep apnea.