The first answer is correct (A).
The League of Nations was a project that emerged at the end of the First World War in 1919. The detonation of Europe and the number of dead in the confrontation made authorities worry about avoiding new wars. President Woodrow Wilson drafted fourteen points that sought to establish a peaceful balance among Europeans, an important document for the creation of the League of Nations, which was a UN embryo. This document won him the Nobel Peace Prize.
Unfortunately the European nations did not accept Wilson's 14 points and were concerned with economic sanctions through the Treaty of Versailles. Historians say that the impositions made on Germany in this treaty were a major motive of World War II.