A study based on over 9,000 U. S. residents found that the most prevalent disorder was major depressive disorder. Option A.
Depression is a mood disorder that causes a persistent feeling of sadness and loss of interest. It affects how a person feels, thinks, and behaves and can lead to a variety of emotional and physical problems. It is also known as major depressive disorder or clinical depression.
Loss of interest or pleasure in activities once enjoyed, sleeping problems or sleeping excessively, varying appetites are examples or signs of depression. According to the study conducted on 9,000 residents in the U.S., major depressive disorder is the most common form of disorder.
Find out more on depressive disorder here: https://brainly.com/question/28142374
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