I thinks it's <span> C. Medical care is considered to be rapidly improving, especially in the urban areas. c:</span>
The lack of Peace agreements definitely contributed as did the conflicts between tribes, I am not even sure what is meant by the first choice, there was no African nationalism at the time so I eliminate it as the choice also. That leaves C. It makes no sense that traders would use guns as methods of trade. The tribes at the time didn't have guns, slave traders would not want them to be able to kill rather than capture so the only ones who has guns were the traders and they wouldn't have given them up because it gave them the up because it gave them the upper hand over the natives they were trading with.
Hope this helped :)
It was very important because it established two things. First is that the Constitution grants to Congress implied powers for implementing the Constitution's express powers, and the second is that state action may not impede valid constitutional exercises of power by the Federal government
