Which of the Following MOST Clearly Illustrates an Obsessive-Compulsive Disorder

Which of the following MOST clearly illustrates an obsessive-compulsive disorder?

A) Morgan washes her hands 10 times after learning that the patient she just treated has hepatitis B.
B) Kendrick is so anxious about his speech for tomorrow that he reviews his notes 20 times.
C) Constant sexual thoughts have made Lauryn anxious for several months.She now carries a prayer book and feels pressured to read passages aloud over and over again everywhere she goes.
D) Mason's house was burglarized last week.He now checks the locks on his doors and windows five times a night, and listens to the radio to stop worrying about his safety.