Today,psychology is defined as the

A) science of mental phenomena.
B) science of conscious and unconscious activity.
C) science of behavior.
D) science of behavior and mental processes.

Mental Processes

The internal, covert activities of the mind, such as thinking, feeling, and problem-solving, that are not directly observable.

Behavior

The actions or reactions of an object or organism, usually in relation to the environment or context.

Mental Phenomena

Processes of the mind such as cognition, emotions, and consciousness that are subjective in nature.