Which of the Following Methods Would Likely Be Effective in Eliminating

Which of the following methods would likely be effective in eliminating a child's phobia of dentists?

A) Inform the child that he will be punished if he does not go to the dentist so the dentist is associated with the positive feelings of nonpunishment.
B) Inform the child that his teeth will hurt if the dentist does not clean them so the dentist is paired with pain relief.
C) Inform the child that his teeth will rot if the dentist does not clean them so the dentist is paired with a feared UCS.
D) Take the child to his favorite restaurant after visiting the dentist so the dentist is paired with a pleasurable UCS.