What Factors Complicate International Response to Genocide

What factors complicate international response to genocide?

A) "Moral hazard"
B) The pace of killing is sometimes much faster than the ability of countries to respond
C) The U.S. and others as a rule do not interfere in the internal affairs of foreign countries
D) Both "moral hazard," and that the pace of killing is sometimes much faster than the ability of countries to respond
E) Both that the pace of killing is sometimes much faster than the ability of countries to respond, and that the U.S. and others as a rule do not interfere in the internal affairs of foreign countries