After Returning from the Iraq War, Caddell Was Plagued by Nightmares

Multiple Choice

After returning from the Iraq war, Caddell was plagued by nightmares of the attacks for months. In addition, he avoided anything associated with the war and was hypervigilant for danger. Caddell might have ________.

A) acute stress disorder.
B) a mood disorder
C) obsessive-compulsive disorder
D) posttraumatic stress disorder