Which of the following best describes a hypomanic episode? a. A milder form of mania with elevated mood and energy b. An episode triggered by substance use c. Lack of interest in most activities d. Severe impairment requiring hospitalization

The correct answer is a. A hypomanic episode is a milder form of mania with elevated mood and energy. It is characterized by symptoms such as increased activity or energy, euphoria, irritability, and decreased need for sleep. However, the symptoms are not severe enough to cause significant impairment in social or occupational functioning or to require hospitalization.