I think that the best answer is the geographic location: many other countries (Sweden for example) have tried being neutral at different times but did not manage to: but the fact that the US has only two boundaries, and that both other countries also have a history of fighting from independence from a European power, makes it possible that unless US decideds to get involved in international politics, it can be "left alone".
Answer:
The film doesn't always improve the viewers understanding, the film could be lying that it's "based on real events". The film maker doesn't always know the real truth.
Thirteenth, Fourteenth, Fifteenth amendments
Answer:
The answer is the last choice:
<em>He won the country’s first open election.</em>
Answer:
In the 19th century African Americans had better rights
Explanation:
In the 19th century African Americans were no longer enslaved. They had rights but not much rights compaired to white people durring that time.