Ari, a young patient who is regularly treated by a psychiatrist, feels compelled to carry out repetitive tasks the same way very frequently. If Ari does not conduct these tasks with extreme precision, he can feel extremely nervous and uncomfortable.

Ari’s repetitive behaviors and intense distress when they are not performed precisely are characteristic of obsessive-compulsive disorder (OCD). OCD can involve compulsions—repeated actions or routines carried out to reduce anxiety or discomfort. Therefore, choice C, OCD, is the best answer.

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