What is the relationship between stress and illness?
A. When stress cause the fight or flight response, it increases the body's ability to fight an illness.
B. Stress can trigger certain illnesses, reduce the body's ability to fight an illness, and make some diseases harder to control
C. Prolonged stress can make a person tired, but it has no harmful effects on the immune system
D. The only relationship between stree and illness has to do with the effects of tension on blood pressure