Sam skips school so that he can play video games at the arcade. Sam's parents find him there and make him mow the lawn when they get home. As a result of having to mow the lawn, Sam doesn't skip school to go to the arcade anymore. Having to do something he dislikes as punisher for the problem behavior is an example of:

a. extinction
b. negative punishment
c. negative reinforcement
d. the Premack Principle