The treaty of Versailles, the fact that WW1 was blamed on them exclusively and the Wiemar republic was very weak.<span />
If you could add what the answer choices are I'd be glad to help! :)
It was marked by the conflict over the proper allocation of power between the states and the federal government.
I think it’s A. The Constitution
I would not support embargo against China. If the embargo is placed economic consequences will exist across the globe. China is one of the world's biggest economies, that does trade with corner of the globe.