Zhao, Qian, and Sun speculated about the rankings of A. B, C, and D: Zhao: "If B is second, then A is first. " Qian: "If C is third Then A is the first place. "Sun:" A is not the first place. "The result of the game showed that the three of them speculated that one of them was true and two were false. Based on this, which of the following judgments cannot be true? ? ['A is first.', 'B is second.', 'C is second.', 'Ding is first.']