The correct answer is C) by supporting US membership more strongly that it had in the case of the League of Nations.
The American public reacted to the formation of the United Nations by supporting US membership more strongly that it had in the case of the League of Nations.
The United Nations was founded on October 24, 1945, during the works of the San Francisco Conference. President Harry Truman considered very important that the United States had a leading role internationally to stop the spread of Communism throughout the world. This leading role was well accepted by United States citizens. American people favored the membership of its country in the United Nations, as a way to place the US as a leading nation in the international scene.