People with bipolar disorder alternate between periods of

A) obsessions and compulsions.
B) alcohol abuse and abstention from alcohol.
C) depression and mania.
D) one personality and another.

Bipolar Disorder

A mental disorder characterized by significant fluctuations in mood, alternating between periods of depression and mania.

Depression

A psychological disorder characterized by persistent sadness, loss of interest in activities, and a range of emotional and physical problems.

Mania

A mental health condition characterized by periods of great excitement, euphoria, delusions, and overactivity.