Animals Trained on Schedules of Reinforcement Sometimes Show a Post-Reinforcement

Multiple Choice

Animals trained on schedules of reinforcement sometimes show a post-reinforcement pause-they stop responding for a while immediately after reinforcement is delivered. Which of the following schedules would NOT show a post-reinforcement pause?

A) intermittent ratio
B) short-delay schedule
C) fixed-ratio
D) fixed-interval
E) variable-interval