Bill is motivated to work hard in school because his parents promised him a car if he graduates in the top ten percent of his class. It could be said that he is being motivated by __________.

Bill is working hard because he expects to receive a car if he reaches his goal. A promised car is an external incentive, or reward, so the best answer is rewards. Pride, beliefs, and values do not describe the promised benefit motivating him here.

AI-written and checked against the verified answer.