Which of these BEST explains why the United States did NOT join the League of Nations?

B) After World War I many Americans were wary of becoming too entangled in European affairs and favored a more "isolationist" approach.

Explanation:

Even though the creation of the League of Nation was a proposal of the American President Woodrow Wilson, the United States decided not to join it. Tired of becoming too entangled in European affairs during World War I, Americans preferred to adopt an isolationist policy, to stay out of global affairs, avoid political or economic alliances that didn't serve their interests and, instead, to focus on domestic issues