Jason is so preoccupied with staying clean that he showers as many as 10 times each day. Jason would be diagnosed as suffering from a(n)

A) dissociative disorder.
B) generalized anxiety disorder.
C) personality disorder.
D) obsessive-compulsive disorder.

Jason's behavior of showering excessively to the point of interfering with daily life and causing distress is characteristic of obsessive-compulsive disorder (OCD). OCD involves intrusive thoughts (obsessions) and repetitive behaviors (compulsions) that an individual feels driven to perform in order to reduce anxiety or prevent a feared outcome. Excessive washing or cleaning is a common compulsion in OCD.