What were native Americans groups most threatened by?

Which of the following could be described as a conservative reaction against the ideas of the jazz age

Human rights groups in the 20th century worked to: o a. european imperial powers maintain control over their colonies. o b. convince citizens in impoverished countries to embrace nationalism. o o o o c. ensure that people around the world were protected from brutal treatment. o d. weaken the influence of international organizations like the united nations. sub

The national security act of 1947 reflected: