PT 63 S1 Q22

One child pushed another child from behind, injuringthe second child. ... ...

Which one of the following principles, if valid, most helps to justify the reasoning in the argument?
(A) An action that is intended to harm another person is wrong only if the person who performed the action understands the difference between right and wrong.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in June 2011 LSAT (PT 63): Logical Reasoning A