Which of the Following Statements Is Inconsistent with Milton Friedman's

Which of the following statements is inconsistent with Milton Friedman's argument regarding the responsibility of a firm?

A) Labour leaders' only responsibility is to serve the interests of their unions.
B) Free and open competition is beneficial to business.
C) Profit maximization is the primary purpose of business.
D) The only social responsibility of business is to make profits.
E) All of the answers are consistent with his position.