When Bobby was given a work sheet in class, he screamed and crawled under his desk. Bobby would continue to scream and remain under his desk until his teacher removed the work sheet and left him alone. Which of the following extinction procedures is the most appropriate choice?
a) Extinction of behavior maintained by positive punishment
b) Extinction of behavior maintained by automatic reinforcement.
c) Extinction of behavior maintained by positive reinforcement.
d) Extinction of behavior maintained by negative reinforcement.