In a dissertation competition at a university, only one person can win the first place. Who is the first place? When predicting the rankings of the six contestants A. B, C, D, E, and H, the four made the following predictions: A: The first place will be either me or B. The second place: It is either A or C. C: If it is not E, it must be the first. D: The first place will never be A. After the game, only one person predicted that correct. Excuse me: who won first place? ? ['A.', 'B.', 'C.', 'Ding.']