Merlin Is Presented with Reinforcement at the End of Every

Merlin is presented with reinforcement at the end of every hour that he does not burp in class. After receiving reinforcement at 10:00 A.M. and 11:00 A.M., he burps at 11:56 A.M. His teacher promptly starts a new hour interval in which Merlin must refrain from burping until 12:56 P.M. in order to receive reinforcement. Which type of DRO variation schedule is his teacher employing?

A) DRO progressive schedule
B) DRO reset schedule
C) DRO fixed-interval schedule
D) DRO increasing-interval schedule