Mavis is the director of an ABA clinic in which each BCBA is responsible for overseeing a team of five RBTs, providing supervision for at least 10% of the RBT's weekly hours. Currently, the 10% goal is only being met for a third of the RBTs, despite Mavis delivering repeated feedback. Mavis announces a new policy, under which every BCBA who meets the 10% supervision goal for a whole month will receive four extra hours of paid time off. After three months of the new policy, 75% of RBTs are receiving the required amount of supervision. What strategy is Mavis using to change her employees' behavior? Select one: A. Incentives B. Task clarification C. Reducing task aversiveness D. Goal setting