Which One of the Following Is the Best Example of Punishment

Which one of the following is the best example of punishment as behaviourists define it?

A) Kelly has been acting up in the classroom all year.Her teacher's frequent reprimands have not made much of a difference in Kelly's behaviour.
B) William is a real distraction to his classmates, often burping in a way that makes other students laugh.His teacher places him in a corner where others cannot hear him burping.
C) Whenever Yerif has trouble sitting still, his teacher has him run up and down the hall three times to release pent-up energy.
D) After Lois spends a few minutes in the time-out room for hurting a classmate's feelings, she acts more compassionately toward that classmate in the future.