Answer:
C. Conditioned reinforcer.
Step-by-step explanation:
When you provide a reinforcer after each response in backward and forward chaining the outcome of that response becomes conditioned reinforcer.
Conditioned reinforcer occurs when a stimulus reinforce or strengths, set of behavior through its association with a primary reinforcer, they also known as secondary reinforcers because they are dependt on an association with primary reinforcers example grade, money, praise, food and physical comfort.