Latoya's Mother Has Established a Reward System in Which Latoya

Latoya's mother has established a reward system in which Latoya earns one gold star for each chore she completes each day.If she earns 25 stars by the end of the week,Latoya's mother will take her to play at the "fast food restaurant's" playground for two hours.Latoya's mother is using which psychological approach?

A) psychodynamic
B) cognitive
C) humanistic
D) behavioristic