Mr. Grammarcy has been having trouble sleeping at night, and his lack of sleep is beginning to interfere with his ability to function properly during the day. He’s concerned that he may lose his job in the next round of lay-offs at his company. He is also having marital problems. He tends to lay awake at night, worrying about these problems and thinking about what he can do to resolve these issues. Based on the discussion in the text, Mr. Grammarcy should understand that _____.

a. worrying increases one's bodily arousal, which can prevent normal sleep
b. sleep is a natural function that cannot be forced without medical intervention or biofeedback training
c. daily hassles and concerns do not normally interfere with normal sleep, so he should look for a medical reason for his insomnia
d. sleeping pills, used according to directions, will resolve his sleep problems
e. when his marital issues are resolved, his sleep pattern will return to normal, regardless of his concerns about his job