They were upset because the law forbade them from settling in the Ohio River Valley where there was fertile soil for farming, and the Native Americans weren't using it, plus many colonists had already bought land west of the Appalachians and now weren't allowed to move. Many colonists did not respect the Native Americans and did not want to preserve their land. The colonists just ignored the law and moved across the Appalachians.
The plague stopped the movement plus lack of technology
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I think the answer is D, I might be wrong though but hope I helped! Sorry if I didn't!
The quotation that sums up Hoover's beliefs about government role is C. <span>"The test of our progress is not whether we add more to the abundance of those who have much. It is whether we provide enough for those who have little."</span>
One of the main ways in which the XYZ Affair helped build the country's armed forces was that it brought the United States and France close to an armed conflict, which forced the US to prepare its military and military supplies.