Which of the Following Is Not a Stated Limitation of the Theory

Which of the following is not a stated limitation of the theory of differential opportunity?

A) Crimes are often committed by those who are part of the lower class.
B) Some of the key terms in the theory, such as "aspiration," are not well defined.
C) There is no evidence that lower class versus upper class youth find limited success in school to be more frustrating.
D) There is no evidence to support the idea that those in the lower class want to be part of the middle class.