How do the functions of the HPA axis compare to those of the sympathetic nervous system?

a. The sympathetic nervous system readies the body for brief, vigorous action, and the HPA axis controls digestion and other vegetative activities.

b. The sympathetic nervous system activates the brain, and the HPA axis activates the rest of the body.

c. The sympathetic nervous system readies the body for brief, vigorous action, and the HPA axis prepares the body for prolonged coping with a persistent stressor.

d. The sympathetic nervous system is active during a stressful situation, and the HPA axis becomes active at the end of the stressful situation.