The Difference Between Insomnia and Sleep Apnea Is That

The difference between insomnia and sleep apnea is that

A) apnea affects primarily the elderly, whereas insomnia is characteristic of children.
B) insomnia is treatable, but apnea is not.
C) insomnia is characterized by sleeplessness, whereas sleep apnea is characterized by breathing difficulties.
D) apnea is a precursor to narcolepsy, whereas insomnia is not.
E) insomnia occurs when a person cannot get to sleep, and sleep apnea occurs when people constantly wake up too early in the morning.