The Irony of the League of Nations Is That

The irony of the League of Nations is that

A) although Wilson proposed it,the United States never joined.
B) once Russia joined,it became a Bolshevik propaganda tool.
C) although formed by Europeans,it had it greatest success in non-European areas.
D) it became a military threat to member states who had supported it to promote peace.
E) none of the Allied victors would join it.