Answer:
By executing this strategy of rewarding the actions leading to the desired behavior Darren is using C) shaping to get his son to eat his peas.
Step-by-step explanation:
Shaping is a method of conditioning the desired behavior used in the experimental analysis of behavior. It uses a differential reinforcement schemes of successive approximations. In other words, it establishes the whole expected behavior process and reinforces all o the desired behavior stages until it only reinforces the expected behavior. It is a very effective way to condition the behavior the executor expects.