Which of the following is the best example of applied behavior analysis?

a. Agatha observes a child to see what purpose a disruptive classroom behavior serves and identifies a new replacement behavior. She then implements a training program for the new behavior, reinforcing often at the simplest levels and gradually removing reinforcers as the child demonstrates the behavior independently.

b. Tiffany works with children by asking them what they want to accomplish and then helping them attain that goal through different forms of classical conditioning.

c. Bethany has children watch her repeatedly so as to understand how a task is to be done. Once they have finished the observation, they are asked to imitate the behavior.

d. Camille wants children to learn a new behavior and uses punishment as the basis for the behavior change.