Chris was caught exposing his penis to an unsuspecting woman in a park and is ordered by the court ...

Chris was caught exposing his penis to an unsuspecting woman in a park and is ordered by the court to undergo psychological counseling. The therapist assigned to Chris uses a technique to help Chris reduce his paraphilic behavior.
 
  The therapist asks Chris to imagine that he is exposing his penis to a woman in public; while making a mental picture of this imagery, Chris receives a mild shock. What type of therapy is this an example of?
 
  a. erotic reconditioning c. social skills training therapy
  b. cognitive behavioral therapy d. aversion therapy