Answer:
C. Babs saw Martin receive a candy bar for completing his reading list. She is careful to complete her reading list because she saw Martin get a reward for doing it.
Step-by-step explanation:
Vicarious reinforcement refers to a process of learned behavior that is encouraged by watching other people getting getting positive value from it
When babs saw Martin received the Candy, Babs will form an internal motivation to mimic the things that Martin does in order to obtain the same reward, which make her careful to complete her reading list.