The United States did not sign the Treaty of Versailles because two groups of U.S. senators opposed some of the treaty's conditions and prevented the Senate from acquiring the two-thirds majority vote needed for its passage. One of their main objections was that the treaty compromised U.S. autonomy.
You didn't provide choices, but the main reason for refusing entry into the League of Nations was the belief that doing so meant giving up some of the United States' own sovereignty and could commit the US to defend other nations' security rather than its own.
Context/detail:
The United States never joined the League of Nations, in spite of the fact that an organization such as the League of Nations was the signature idea of US President Woodrow Wilson. He had laid out 14 Points for establishing and maintaining world peace following the Great War (World War I). Point #14 was the establishment of an international peacekeeping association. The Treaty of Versailles adopted that idea, but back home in the United States, there was not support for involving America in any association that could diminish US sovereignty over its own affairs or involve the US again in wars beyond those pertinent to the United States' own national security. Because of its objections to membership in the League of Nations, the United States Senate refused to ratify the Treaty of Versailles.
Capitalism and socialism are formal economies. The major differences between capitalism and socialism revolve around the role of the government and equality of economics. Capitalism affords economic freedom, consumer choice, and economic growth.
In my opinion, I think that it is unfair to the women in Saudi Arabia because they have to depend on a man to make decisions. Not just that, this policy happens for the woman's whole life. I think that women should have an open mindset and make decisions just like men. They should be seen as equal and not distinct just because of different body parts. This stereotype in my opinion is very wrong because we are all equal and same no matter what gender.