What is the defining characteristic of a manic episode? a. Reduced energy levels b. Social withdrawal c. Elevated or irritable mood lasting at least one week d. Depressive mood for at least two weeks

The correct answer is c. Elevated or irritable mood lasting at least one week.<br /><br />A manic episode is characterized by an abnormally elevated or irritable mood that lasts for at least one week. During a manic episode, individuals may experience increased energy, reduced need for sleep, grandiosity, racing thoughts, and impulsive behavior. These symptoms can significantly impair an individual's ability to function in daily life and may require medical attention.