Answer: B. A sumo wrestler near the top of the elite pyramid may earn millions of dollars.
Explanation: In the given excerpt from Levitt and Dubner’s Freakonomics we can see the explanation of how the ranking in sumo wrestling works, and how there is an elite pyramid of the sixty-six highest-ranked wrestlers in Japan who are treated like royalty and may earn millions of dollars a year, while the wrestlers that aren't in the elite are treated like servants by their superiors, this situation might incentive a sumo wrestler to cheat.