Answer:
A. worrying increases one's bodily arousal, which can prevent normal sleep
Step-by-step explanation:
It is a medically proven fact that when an individual worries too much or is under stress their bodily functions get affected. In the case of Mr. Grammarcy, he needs to find a way to distract himself from thinking too much about the problems he's facing. It's often recommended to seek professional help when facing such issues.