Which of the Following Is a Critique of Davis and Moore's

Which of the following is a critique of Davis and Moore's structural functional explanation of inequality? Select all, but only those that apply.

A) In arguing the privilege need their rewards to enhance all of society, the explanation perpetuates social inequality.
B) It assumes just because society has been unequal in the past; it must continue to be so in the future.
C) There are many examples of rewards being disjuncture from importance; many lower paying positions (like garbage collectors) are extremely important
D) There may not be a scarcity of people capable of filling high-level positions; only a scarcity of structural opportunity for more people to do so
E) People could be motivated by things other than power, prestige, and income.