(A) Germany
(B) France
(C) Britain
(D) ** United States
EXPLANATIONS BELOW
Concept note-1: -The Allies also excluded the defeated Central Powers (Germany, Austria-Hungary, Turkey, and Bulgaria). According to French and British wishes, Germany was subjected to strict punitive measures under the terms of the Treaty of Versailles.
Concept note-2: -The prominent players of this treaty were those countries that won the First World War, UK, US, Italy, Japan and France. But the defeated powers like Germany, Austria and Turkey were not invited to the conference. Russia, which stayed away from the war after the revolution, was not invited too.
Concept note-3: -Answer and Explanation: The Allied country that refused to ratify the Treaty of Versailles was the United States.