Angel Is Worried That Her Intrusive, Unacceptable Thoughts Are Signs

Angel is worried that her intrusive, unacceptable thoughts are signs of obsessive-compulsive disorder. Research suggests that ____.

A) unless the thoughts are bizarre, she does not have the disorder
B) she probably has the disorder because it is defined by intrusive thoughts
C) she cannot have the disorder unless she engages in compulsive behaviors
D) such thoughts are common unless they cause her discomfort or are uncontrollable