In World War II, during the summer of $1944$, the Russians were driving back the Germans. Stalin wanted to launch a fierce attack at one of three spots in western Russia: the north, the south, or the center. He also wanted to be completely unpredictable in his decision. **Which of the following would have been fair methods for deciding where to attack?** (Consider a system to be fair when the probabilities of each event are equal.) [[☃ radio 1]]