Tad's ex-girlfriend used to wear Chanel perfume. Since their bitter break-up, Tad has found that he feels angry whenever he smells Chanel No. 5. What is the best way for Tad to get to the point where smelling Chanel No. 5 will no longer make him feel angry? a. He should find a new girlfriend. b. He should focus on how angry he is at his ex-girlfriend. c. He should avoid contact with his ex-girlfriend for at least six months. d. He should frequently go to the local perfume counter and smell Chanel No. 5.