Tebogo Is Currently Completing a Chemical Formula That He Knows

Tebogo is currently completing a chemical formula that he knows will cure cancer.He recently submitted a book to a publisher and was sure that it would become a bestseller.For several weeks prior to this, he was bedridden, morose, had no energy and lacked any spontaneity.He never left his bed and had to be cared for by his family.Tebogo's diagnosis is

A) major depressive disorder.
B) persistent depressive disorder.
C) bipolar I disorder.
D) bipolar II disorder.