Which of the following is defined as the branch of psychology that is concerned with establishing the principles of right and wrong behavior? A. morals B. ethics C. behavior D. actions

Answer: ethics.

Ethics and moral are usually confused, but they are differente. You can think of ethic as the "science" whose object is to study (by the use of rigorous reflection) the human acts to distinguish right from wrong. While moral is related with costumes of a particular culture.