Answer:B.token economies
Step-by-step explanation:
Token economy refers to giving someone a reward with an aim of encouragement and enhancement of a desired behavior. This token economy comes in form of tokens , food, stickers and any other rewards that are meant to improve a positive behavior. Parents can use token economy and it is also used by teachers in schools to encourage good performance from teh students. The ideas of a token economy is to reinforce the positive behavior. Just as we see how Zack mom rewards him with stickers for cleaning his room and as a result he keeps cleaning his room consistently.