The Major Finding of Walter Cannon's Research into the Physiological

The major finding of Walter Cannon's research into the physiological consequences of stress was that

A) psychological stress can cause a change in physical functioning that activates and assists our responses.
B) psychological stress is the number one factor in the cause of heart disease.
C) psychological stress, in small amounts, actually promotes cellular repair more rapidly than when that stress is absent.
D) psychological stress causes the hormonal changes that mirror menopause in women and andropause in men, which is why stress so often leaves people "moody" and unpleasant.