Little Jimmie’s mother was upset to find that Jimmie had not picked up his building blocks after repeated requests to do so. The next morning, Jimmie found all his blocks had been picked up and put into a bag on top of the refrigerator. Jimmie’s mother told him that he couldn’t play with his blocks for the next 2 days. Which type of discipline did she use?

a. negative reinforcement

b. punishment by removal

c. punishment by application

d. positive reinforcement