According to the Norm of Responsibility, Why Does Altruism Increase

According to the norm of responsibility, why does altruism increase with age?

A) Improved role-taking skills help the child infer the other person's feelings.
B) Improved understanding of empathic arousal produces self-reflection.
C) The child is less likely to experience empathic distress.
D) Children are more likely to make external attributions for the distress experienced by another person.