According to Research on a Child's Developing Theory of Mind

According to research on a child's developing theory of mind, what is necessary for a child to demonstrate a mature capacity for moral reasoning?

A) an ability to focus on the objective consequence of a person's action
B) an ability to understand that it is wrong to harm another person and to recognize when someone has been harmed
C) an ability to interpret a person's objective behavior in light of his or her subjective mental state
D) a tendency to perceive that some "bad" actions are worse than others