Final answer:
Ethics is the discipline that primarily concerns what is "right" or "good" in a governing moral code.
Step-by-step explanation:
In the context of a governing moral code, what is primarily concerned with what is "right" or "good" is ethics.
Ethics is a discipline that establishes principles of the good and principles of right behavior, dealing with the basic principles that serve as the basis for moral rules. It focuses on determining what people believe ought to be the case in terms of morality
Therefore, the subject that primarily concerns what is "right" or "good" in a governing moral code is ethics.