The answer is B. Sitting Bull.
He is seen as the central leader, however there were others Chiefs, primarily Crazy Horse.
Spain and the United States i think
The act was about ensuring people have voting rights and preventing states from preventing voting rights in various ways such as having literacy tests or voting taxes or anything similar. One effect can be that it enabled for all people to vote regardless of color or origin, and another is that it enabled minorities and immigrants to vote too because it enabled minorities who didn't know English that well to vote using bilingual ballots.
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The Framers of the Constitution gave the President the power to veto acts of Congress to prevent the
<span>The Dawes Act had a negative effect on American Indians, as it ended their communal holding of property, by which they had ensured that everyone had a home and a place in the tribe.</span>