The correct statement regarding the U.S. and the Treaty of Versailles is:
The US never officially ratified the treaty, and refused to join the League of Nations.
After World War I, the Treaty of Versailles was drafted to end the war and establish peace terms. However, the U.S. Senate did not ratify the treaty, largely due to opposition against joining the League of Nations, which was seen by some as compromising U.S. sovereignty. As a result, the U.S. did not become a member of the League.