How did countries around the world respond to the holocaust after world war 2

In the decades since the Holocaust, some national governments, international bodies and world leaders have been criticized for their failure to take appropriate action to save the millions of European Jews, Roma, and other victims of the Holocaust. Critics say that such intervention, particularly by the Allied governments, might have saved substantial numbers of people and could have been accomplished without the diversion of significant resources from the war effort.

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They established a new category of crimes for actions similar to those of the Holocaust (APE3X)

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#2 the answer is d

#3 the answer is a

#4 the answer is b