When the nazi death camps were liberated, people around the world were most shocked by the existence of the camps. the size and scale of the camps. the secrecy of the camps. the locations of the camps.

I'm pretty sure the answer is "The size and scale of the camps" because if you think about it if they were planing to liberate the camps then they already knew about them, so that gets arid of "the existence of the camps".

The articles created a national government composed of a congress, which had the power to declare war, sign treaties, make alliances and more.