Harold Is So Sad That for Months He Can Barely

Multiple Choice

Harold is so sad that for months he can barely get out of bed.If he does,he just sits at the kitchen table with his head on his hands.Yet for a few weeks,about once every four or five months,he reverses mood.He becomes chatty and animated,uncharacteristically spending lavishly.Harold most likely has

A) schizophreniA.
B) euphoria.
C) bipolar disorder.
D) major depressive disorder.