During the Second World War, Tehran, Yalta, and Potsdam were
(A) pivotal military victories for the Allied nations
(B) decisive victories for the Axis powers
(C) sites of Nazi concentration camps
(D) sites of conferences held by the Big Th ree
(E) key beaches during the invasion of Normandy
During the Second World War, Tehran, Yalta, and Potsdam were "(D) sites of conferences held by the Big Three," since this is where Roosevelt, Stalin, and Churchill met to discuss war plans and post-war planning.