Which of the Following Statements Is True Regarding Social Responsibility

Which of the following statements is True regarding social responsibility in marketing?

A) Being socially responsible can lead to a positive response from customers.
B) Being socially responsible can conflict with a firm's profit objective.
C) Companies tend to avoid developing written codes of ethics because standards for professional behavior are ambiguous by nature.
D) All of the above.
E) Only A and B above.