Which of the Following Is Correct with Regard to Managerial

Which of the following is correct with regard to managerial ethics?

A) A manager who discriminates against any ethnic minority in hiring is exhibiting illegal,but not unethical,behaviour.
B) If a manager pays an employee less than he deserves because the manager knows the employee can't afford to quit,the manager is clearly behaving unethically.
C) Ethics are not usually an issue when a firm deals with customers.
D) It is difficult to deal with ethical issues because there is a lot of global variation in business practices.
E) All of the statements are correct.