Answered

At the end of World War I, which of the following caused the greatest damage to President Wilson’s legacy?

AHenry Cabot Lodge became an isolationist.
BRepublicans gained power in Congress.
CThe US never joined the League of Nations.
DWilson became too ill to make public appearances.

Verified Answer :

At the end of World War I, the caused the greatest damage to President Wilson’s legacy is C, the US never joined the League of Nations. He went out broken physically however gently certain that his vision of America assuming a focal part in an alliance of countries would be acknowledged in the end.

The answer is ( US never joined the League of Nations)