Sam Has Persistent and Distressing Thoughts of Germs; He Cannot

Sam has persistent and distressing thoughts of germs; he cannot eat without washing his hands three times before and three times after every meal.Although his hands are raw from the washings, he is overwhelmed with anxiety if he doesn't wash this way.Sam's problems illustrate ____.

A) posttraumatic stress disorder
B) obsessive-compulsive disorder
C) agoraphobia
D) generalized anxiety disorder