What Is the Theoretical Basis for Selye's Concept of the General

What is the theoretical basis for Selye's concept of the General Adaptation Syndrome?

A) That stress levels are primarily determined by the number of stressful events we experience.
B) That prolonged stress has a damaging physiological effect on our bodies.
C) That our interpretations of events are key for determining our reactions.
D) That some people are more vulnerable to stress than others.