The
a0 was the name for the three leaders who met at tehran, yalta, and potsdam to determine the outcome of wwii

Prime minister of Britain Winston Churchill, the Soviet Premier Joseph Stalin and, U.S. President Franklin D. Roosevelt

On Odyssey ware, I'm fairly certain it is the big three, that was the name of all three collective leaders, Joseph Stalin, Winston Churchill and I think harry Truman, if not it is Franklin Roosevelt.

d. china

good luck

d is the best choice