What Basic Flaw Do Critics Cite as the Major Problem

What basic flaw do critics cite as the major problem with using value ethics as a decision-making tool?

A) The decision-making framework to too rigid.
B) People in different walks of life would come to different decisions.
C) Not all people are moral or use common sense.
D) The past may not provide the right answer.
E) The decision-making framework is difficult to understand.