I mean for many of the survivors, it was hard to rebuild after enduring such a tragic moment. Seeing so many friends, people, and family perish in front of their eyes at the thousands :(
The answer to this question would be A. Montesquieu believed in separation of powers. There should be three branches and each branch should be able to "check" the other. No branch would have more power than the others. The two houses of legislature would be able to block bills introduced by the president, while the president can veto any bills he found improper that were drafted by the legislative branch.
In exchange, the United States pledged to avoid involvement in the political affairs of Europe, such as the ongoing Greek struggle for independence from the Ottoman Empire, and not to interfere in the existing European colonies already in the Americas.
The answer is European colonies that are already existing in the Americans.
