Hans Selye's concept of stress includes

A) only those events that cause lack of sleep.
B) only those events that elevate epinephrine levels for at least a month.
C) only a person's reactions to unpleasant events.
D) all events that make any demands on the body.

Hans Selye

A pioneering Hungarian-Canadian endocrinologist known for his research on the stress response and the development of the general adaptation syndrome (GAS) theory.

Epinephrine Levels

The concentration of epinephrine, also known as adrenaline, in the body which can increase in response to stress or fear, enhancing alertness and physical readiness.

Stress

The body's response to any demand or challenge, which can be triggered by both positive and negative experiences and can affect mental and physical health.