An Executive's Company Requires Her to Engage in a Lot

Multiple Choice

An executive's company requires her to engage in a lot of long-distance travel. At first, after a long trip she would experience fatigue, uncontrollable sleepiness, and a disruption of her sleep-wake schedule that would continue for days. She probably was experiencing

A) narcolepsy.
B) jet lag.
C) insomnia.
D) sleep apnea.