Bipolar disorder is categorized as a(n) :

A) anxiety disorder.
B) depression disorder.
C) mood disorder.
D) psychotic disorder.

Bipolar disorder is classified as a mood disorder as it involves extreme shifts in mood, energy, and activity levels. These shifts can range from episodes of mania, where the individual feels highly energetic and euphoric, to episodes of depression, where they experience overwhelming feelings of sadness, hopelessness, and worthlessness. Anxiety, depression, and psychotic disorders have distinct criteria and symptoms, which differ from those seen in bipolar disorder.