_____ refers to a sleep attack in which a person falls asleep suddenly and irresistibly.

A) Sleep terror
B) Insomnia
C) Sleep apnea
D) Narcolepsy

Narcolepsy is characterized by sudden and uncontrollable episodes of sleep, which are called sleep attacks. These attacks can occur at any time during the day and are often triggered by strong emotions. Sleep terror is a parasomnia disorder characterized by feelings of terror or dread during sleep, whereas insomnia refers to difficulty falling or staying asleep. Sleep apnea is characterized by interrupted breathing during sleep.