The Difference Between Insomnia and Narcolepsy Is

The difference between insomnia and narcolepsy is

A) insomnia causes people to have difficulty falling asleep when they want to, while narcolepsy causes people to fall asleep when they do not want to.
B) narcolepsy causes people to have difficulty falling asleep when they want to, while insomnia causes people to fall asleep when they do not want to.
C) insomnia is a stage 1 and stage 2 disorder, while narcolepsy is a REM stage disorder.
D) narcolepsy is a stage 1 and stage 2 disorder, while insomnia is a REM stage disorder.