Your 28-Year-Old Patient Was Admitted to the Psychiatric Unit with a Diagnosis

Your 28-year-old patient was admitted to the psychiatric unit with a diagnosis of bipolar disorder in major depression with symptoms of withdrawal and extreme sadness. After 2 weeks on the unit, the patient suddenly becomes more talkative, sleeps only 2 hours a night, and acts seductively with the male patients. What is the most likely explanation for this change?

A) The antidepressants are effective.
B) The patient was diagnosed incorrectly.
C) She is having a manic episode as part of her illness.
D) She is recovering from her depression.