If You Wanted to Encourage a Child to Eat a Healthier

Multiple Choice

If you wanted to encourage a child to eat a healthier diet, at first you might smile or nod when the child was willing to take a small bite of a healthy food item on her plate. Then you might only smile and nod when the child took a full bite of the food. Then you might only respond when the child ate several bites, and finally only when the child finished the serving on her plate. You are changing this child's behavior through the process of

A) classical conditioning.
B) negative reinforcement.
C) shaping.
D) assimilation.