Marat Had a Terrible Toothache and Decided to Go to the Dentist

Multiple Choice

Marat had a terrible toothache and decided to go to the dentist. The dentist made the problem worse, and Marat was in a lot more pain. Now, he no longer trusts dentists and is unlikely to go to one in the future if he has a toothache. This is an example of

A) penalty.
B) positive punishment.
C) negative reinforcement.
D) positive reinforcement.