Nick Wants to Encourage His 6-Year-Old Daughter, Anna, to Help

Nick wants to encourage his 6-year-old daughter, Anna, to help with family chores. He makes an outline of a rainbow with seven bands so that Anna can color in a band each time she does a chore. If she does seven chores in a week, coloring in the full rainbow, she gets $1. Nick's technique demonstrates which methods?

A) habituation, positive punishment, and a fixed interval schedule
B) shaping, negative reinforcement, and a variable interval schedule
C) chaining, negative punishment, and a variable ratio schedule
D) a token economy, positive reinforcement, and a fixed ratio schedule