Individuals who worked to prevent conflicts between native Americans and the federal government, who made sure payments were made to the tribes, and who aided in the moving tribes to reservations were called

d.he wanted to send diplomats to communist countries.

d. direct

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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