Exercise can help alleviate depression by:

A) increasing muscle mass.
B) producing social interactions.
C) increasing a person's motivation to stay fit.
D) decreasing the body's need for glucose.

Muscle Mass

The total amount of muscle tissue in an individual's body.

Social Interactions

Exchanges between two or more individuals, influencing each other's behavior and thoughts through verbal or non-verbal communication.

Motivation

The internal or external forces that stimulate desire and energy in people to be continually interested and committed to a role, job, or subject, or to make an effort to attain a goal.