I think it is A also because I am taking the same test in USA Test Prep.
Answer and Explanation:
Hegemony can be seen as when one thing or group of things(a state or culture for instance) dominates and takes over another thing or group of things. It can be compared to something as a trend that has domineering effect such that it is the popular thing and everybody follows it. Hegemony is used in the political space to denote states that dominate over another state or region, the dominating state called the hegemon
The self-determination act promotes Indian self-government which allows them to rule over of the delivery services. This acknowledges the Indians to have independence and discipline in their affairs. The demand of the Native American activists is for the tribes to take over the resources and education.