A Rat Has Been Trained in an Operant Conditioning Chamber

Multiple Choice

A rat has been trained in an operant conditioning chamber to press a lever to get a food pellet. Following the acquisition trials, the researcher then withheld reinforcement for lever pressing and eventually the rat stopped responding. This example illustrates:

A) the effect of negative reinforcement.
B) the effect of punishment by application.
C) learned helplessness.
D) extinction.