A.If a mere sentiment justifies cruelty, why stop at a sentiment for the whole human race?
 B.It is so deep a need that it will find harmful outlets of this kind unless innocent outlets are at hand.
 C.If it is not defended on the ground that it reduces human suffering, on what ground can it be defended?
 D.If we find a man giving pleasure it is for us to prove (if we criticize him) that his action is wrong. But if we find a man inflicting pain it is for him to prove that his action is right.
参考答案：……