I think it's the election of Dwight D. Eisenhower. All of the other choices were done in the name of civil rights. Rosa Parks' not giving up her seat led to boycotts on public transportation. Freedom rides through the south were used as a civil demand for freedom. The march from Selma to Montgomery was an act of civil disobedience in an extremely racist country. The only choice that doesn't fit would have to be Dwight's inauguration.
