Answer:
The most likely reason that the League of Nations was not popular in the United States is Option B. Most Americans did not want to be involved in international problems.
Explanation:
Although the League of Nations which was founded in 1920 was the idea of American President Woodrow Wilson, it never garnered much support among Americans at the time. Wilson like other statesmen in the era felt the world needed a organization that could help to bring about more cooperation and security and that could encourage peace between the nations. Opponents in the United States felt that the League of Nations would cost a lot and reduce the ability to act autonomously for their own interests.