Answer:
The correct answer is A: The United States failed to join the organization.
Step-by-step explanation:
The League of Nations, the predecessor organization of the United Nations, was first established in 1920, at the end of World War I, as a consequence of the peace talks in the Paris Peace Conference. This first multinational organization was supposed to be a way to prevent further global conflicts, such as the First World War, from happening. It was conformed by the Big Five, the five crucial actors in the war that fought against Germany and her allies. These Big Five, were France, Britain, Japan, Italy and the United States. However, the problem arose when several nations, who were supposed to join the organization, and support it, did not even sign their entrance. One such nation was the U.S, one of the main defendants of the League of Nations, but who, at the last moment, decided not to join it. This destabilized the entire organization and rendered it defenseless.