(A) Washington D.C, USA
(B) Berlin, Germany
(C) Vienna, Berlin
(D) ** Paris, France
EXPLANATIONS BELOW
Concept note-1: -The League of Nations was an international organization, headquartered in Geneva, Switzerland, created after the First World War to provide a forum for resolving international disputes.
Concept note-2: -The Treaty of Versailles included a plan to form a League of Nations that would serve as an international forum and an international collective security arrangement. U.S. President Woodrow Wilson was a strong advocate of the League as he believed it would prevent future wars.
Concept note-3: -The League of Nations was an intergovernmental organization founded on January 10, 1920, as a result of the Paris Peace Conference that ended the First World War.
Concept note-4: -The predecessor of the United Nations was the League of Nations, established in 1919, after World War I, under the Treaty of Versailles “to promote international cooperation and to achieve peace and security."