An Establishing Operation Is Any Change in the Environment Which

An establishing operation is any change in the environment which.

A) momentarily alters the effectiveness of the consequence for a behavior that was previously followed by reinforcement.
B) alters the timing of a behavior and momentarily alters the frequency of the behavior that was previously followed by reinforcement.
C) alters the effectiveness of some object or event as reinforcement thus momentarily changing the likelihood of behavior that was previously followed by that reinforcer.
D) alters the effectiveness of some object or event as a contingency-shaped rule and at the same time changes the momentary frequency of the behavior that was previously followed by reinforcement.