Answer:
The right answer is D.
Step-by-step explanation:
The US joined the WWI rather late. At that time, it wasn´t still evident to the public or to many members of Congress that the security and the interests of the USA would require active participation in world affairs after the end of the war. There have always been isolationist feelings in America and those were strong in the aftermath of WWI. Despite the fact that he had played a major role in the negotiations leading to the peace accord of Versailles, president Woodrow Wilson failed to persuade Congress to join the League of Nations.