The difference between bipolar I disorder and bipolar II disorder is the:

A) number of depressive and manic episodes.
B) severity of the manic episodes.
C) number of depressive episodes.
D) seasonal variation in the episodes.

Bipolar I Disorder

A mental disorder characterized by periods of manic episodes which may be preceded or followed by episodes of depression.

Bipolar II Disorder

A psychiatric disorder characterized by periods of depressive episodes and hypomanic episodes, without the full-blown manic episodes seen in Bipolar I Disorder.

Manic Episodes

Periods of abnormally elevated mood and energy levels, often characteristic of bipolar disorder, that can include increased activity, rapid speech, and impulsive behavior.