According to DSM-5, a manic episode involves abnormally elevated, expansive or irritable mood together with increased activity or energy lasting how long?

1. A manic episode is a distinct period of abnormally and persistently elevated, expansive or irritable mood. 2. It must also involve abnormally and persistently increased activity or energy, lasting at least one week and present most of each day. 3. Features include excessive talkativeness, flight of ideas, distractibility, grandiosity and little need for sleep. 4. Reckless spending, driving, gambling and sexual encounters may follow, and involuntary hospitalisation is sometimes required. 5. The one-month threshold belongs to posttraumatic stress disorder, so it is the nearest wrong answer. _Source: OpenStax Psychology (1st ed., CC BY 4.0), Ch 15 "Psychological Disorders", section 15.7 Mood Disorders_