Which best explains why the relationship between the united states and china improved toward the end of the twentieth century?

In the mid-1800s, native americans who had lived in the westtraded their manufactured goods with settlers.were able to resist diseases carried by settlers.offered their services as guides to settlers.prevented settlers from moving onto their territory.

After the congress of vienna europe

Brainliestttme : ) what economic changes occurred after world war ii? ( economic boom, baby boom, g.i. bill of rights)