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.)
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