Tommy Exhibits Symptoms of Irritable Mood, Poor Appetite, Disturbed Sleep

Tommy exhibits symptoms of irritable mood, poor appetite, disturbed sleep, low energy, difficulty concentrating, and feelings of worthlessness. These symptoms are fairly severe and have been present for about one month. They are interfering with Tommy's functioning at school and with his peers. Tommy would most likely receive a DSM-IV diagnosis of

A) masked depression.
B) bipolar disorder.
C) major depressive disorder.
D) dysthymic disorder.