In Behavioral Therapy, Differential Reinforcement Is When

In behavioral therapy, differential reinforcement is when

A) the counselor and client analyze and manipulate preceding contingencies.
B) the desired behavior doesn't occur naturally, so behaviors that are close to the desired behavior are rewarded.
C) rewards are given when a client is not performing an undesirable behavior.
D) symbols are substituted for reinforcers. The symbols, such as poker chips, are eventually exchanged for positive reinforcers.
E) the client receives different reinforcements for each instance of desired behavior.