The correct answer is C. Teheran.
The Tehran Conference was a meeting of the leaders of the United States, the United Kingdom, and the Soviet Union, held in Tehran, Iran from November 28 to December 1, 1943. The three leaders were President Franklin D. Roosevelt of the United States, Prime Minister Winston Churchill of the United Kingdom, and Premier Joseph Stalin of the Soviet Union.
The purpose of the conference was to discuss the future of the war against Nazi Germany and its allies, and to plan for the post-war world. The three leaders agreed to open a second front in Europe in 1944, and to invade Germany from the west and the east. They also agreed to support the establishment of a new international organization to maintain peace after the war.
The Tehran Conference was a significant event in the history of World War II. It was the first time that the leaders of the three major Allied powers had met face-to-face, and it helped to solidify the alliance between the United States, the United Kingdom, and the Soviet Union. The conference also set the stage for the D-Day invasion of Normandy in June 1944, and for the eventual defeat of Nazi Germany.
The other options are incorrect.
- Option A is incorrect because Moscow is the capital of Russia. The Tehran Conference was not held in Moscow.
- Option B is incorrect because San Francisco is a city in California. The Tehran Conference was not held in San Francisco.
- Option D is incorrect because Washington D.C. is the capital of the United States. The Tehran Conference was not held in Washington D.C.