I think that the answer is a. They became entangled in civil wars due to the political crisis.
3. the constitution, 1789
"A. Poverty was eliminated" was not a result of the American Civil Rights Movement, since many African Americans remain in poverty to this day at disproportional levels from white people and other races in the US.
The Mayflower compact was considered a social contract, which greatly influenced the development of democracy as the founding fathers created a similar contract: the Articles of Confederation. The Articles of Confederation holds a contract to the people that their are certain parliaments that hold representatives for them, in other words a democracy. But as we soon find out this social contract was inefficient and failed, thus leading to the Great Compromise and the United States Constitution. Long story short, The Mayflower Compact set an example for the United States of America of keeping a social agreement between their people. <span />
One reason the league of nations failed was because "<span>A. It did not establish rules or structure to maintain harmony" since it was more of a general idea structure. </span>