Jerome Is Training to Be a Vacuum Cleaner Sales Person

Multiple Choice

Jerome is training to be a vacuum cleaner sales person. Initially, he got paid for each customer he called on, even if the customer did not ask for a demonstration. Currently, he gets paid for only actually demonstrating the product. Eventually, he will get paid only for actually closing a sale. What process is illustrated in this example?

A) classical conditioning
B) modelling
C) negative reinforcement
D) shaping