President nixon stopped the federal termination policy and agreed that native american should be the basis of government policy. a. self-determination b. religious participation c. educational achievement d. economic success

The correct answer here would be A.

President Nixon was sure that the Native American self-determination is what should the government policy should be based on. This refers to beliefs, legislation and the social movements through which they can  and should exercise their right to self governance. 

"teotihuacan was the cultural center of the zapotecs".