Based on the excerpt, which of the following statements best summarizes the incentive system that ranks sumo wrestlers? The incentive system penalizes elite sumo wrestlers. The incentive system rewards elite sumo wrestlers. The incentive system treats all sumo wrestlers equally. The incentive system treats all sumo wrestlers like royalty.

I would say that the correct answer is that the incentive system rewards elite sumo wrestlers.

The incentive system works in the following way - if the sumo wrestler wins a lot, he will be treated like royalty. He will get a lot of money ($170,000 a year), and the other lesser-ranged sumo wrestlers will serve him. So, the more he wins, the more incentives he gets.