President Woodrow Wilson's 14 Points plan was a statement of principles for peace negotiations to bring a proper end to World War 1 and prevent future wars with point 14 being the formation of the League of Nations. So the answer is C.
The movement of Soviet troops into Afghanistan.
The United States allowed immigration to help the victims avoid the Holocaust although not in the larger numbers that could have been more helpful. The United States entered the war in 1941 and also attacked Germany in retaliation. The Holocaust continued because the Nazis had a very well organized system of apprehension of people that were put in the camps.