The signers of the peace treaty supported the creation of the League of Nations. What happened that prevented the United States from joining the league?
A.
Wilson liked it but it never passed in the Senate.
B.
Wilson opposed the League and it never made it to a Senate vote.
"Wilson liked it but it never passed in the Senate" would be the best option from the list, since there was a heavy isolationist sentiment in the US at the time, and most people did not want to risk the US getting involved in another European war.