Which of the Following Provides the Best Definition of Ethics

Which of the following provides the best definition of ethics?

A) Ethics is a formal system for evaluating who profits in a business transaction.
B) Ethics is merely a different term for the laws and regulations created by a government.
C) Ethics is merely another word for morality, which is only involved in what is right and what is wrong.
D) Ethics is a simplified term given to the momentary decisions we all make regarding which answer will lead each person to the most personally successful solution.
E) Ethics is a formal system for deciding what is right and wrong and for justifying moral decisions.