Research on Exercise and Stress Has Found Which of the Following

Research on exercise and stress has found which of the following to be TRUE?

A) Exercise produces stress hormones, and can be more harmful than good.
B) Exercise exacerbates the muscle tension that builds up during stress.
C) Exercise increases strength and stamina for coping with future stress.
D) Only mild or moderate exercise is helpful; strenuous exercise is detrimental to coping.