A(n) reinforcer refers to the removal of an unpleasant stimulus, for instance, putting on a sweater when a person feels it is cold, which leads to an increase in the probability that a preceding response will be repeated in the future.

Negative Reinforcement

Explanation: Negative reinforcement is an efficient method that can be used to help teach desired  behaviors by removing something uncomfortable  in response to a stimulus which overtime,   that target desired  behavior increases with the knowledge  that the unpleasant thing will be taken away.

for example when a mother switches off the TV when a son hasn't done his homework, and is watching cartoon, this will increase  the chances that the  son over time will do his homework before watching TV as he understands his mother would put off the TV if he doesn't .

Also, putting on a sweater when a person feels it is cold would make him or she feel warmer which will lead to an increase in the probability that response will be repeated in the future.

answer; i believe the answer is 80%, plz check first good luck;

the correct answer is c.