Answer:
1. D. Based on the central idea, cheating tends to exist in Zumo wrestling because "Ranking is everything" that makes you survive as a wrestler.
2.. The three sentences to back up the claim that " Ranking is everything" are
B. “Each wrestler maintains a ranking that affects every slice of his life.”
C. “The seventieth-ranked wrestler in Japan, meanwhile, earns only $15,000 a year.”
D. “Low-ranked wrestlers must tend to their superiors.”
Explanation:
In explaining the key factor of "ranking being everything" , we look it from the fact that Zumo wrestlers in Japan are made so powerful because of the incentive that is attached to the high ranking positions in the category that are available. This ranking that comes with juicy incentives determines the life of a wrestler based on what he can eat, the number of people he can carry about, and how he can sleep well.
However, wrestlers that make up the elite are the makuuchi and juryo divisions with those at the top-earning millions per year while those below earnings ranges from $17,000 to $15,000 thereby making the lower-ranked ones to serve the high ranking ones