The correct answer is: D. Dumbarton Oaks
The United Nations Conference on International Organization (UNCIO) was a diplomatic conference that took place in Dumbarton Oaks, Washington, D.C., from August 21 to October 7, 1944. The conference was attended by representatives of the United States, the United Kingdom, the Soviet Union, and China. The purpose of the conference was to discuss the establishment of a new international organization to replace the League of Nations.
The conference was successful in drafting the Dumbarton Oaks Proposals, which served as the basis for the United Nations Charter. The Dumbarton Oaks Proposals were adopted by the United Nations Conference on International Organization, which was held in San Francisco from April 25 to June 26, 1945. The United Nations Charter was signed on June 26, 1945, and came into force on October 24, 1945.
The other options are incorrect because:
- A. Yalta was a conference held in February 1945 between the leaders of the United States, the United Kingdom, and the Soviet Union. The purpose of the conference was to discuss the post-war settlement in Europe.
- B. London was the site of several conferences during World War II, including the London Conference of 1941, which established the Combined Chiefs of Staff, and the London Conference of 1943, which established the United Nations Relief and Rehabilitation Administration.
- C. San Francisco was the site of the United Nations Conference on International Organization, which was held from April 25 to June 26, 1945. The conference adopted the United Nations Charter.