Please Match the Following Patterns of Behavior with the Schedules

Please match the following patterns of behavior with the schedules of reinforcement below.
(NOT ALL OF THE SCHEDULES BELOW WILL BE USED!)
-___ Fixed ratio

A) After a response is reinforced, no responding occurs for a period of time. Then responding occurs at a high, steady rate until the next reinforcer is delivered.
B) A moderate and steady rate of responding occurs, with almost no post-reinforcement pause.
C) Responding occurs at a high rate, with almost no post-reinforcement pause.
D) No response occurs immediately after reinforcement. Then the rate of responding increases slowly as the interval advances, until the final quarter of the interval where responding occurs at a high rate (fixed-interval scallop) .