The four fans made predictions on the performance of several teams before the promotion of a certain ball game. They paid more attention to two of them. Don't make the following predictions: Fang said: If Team A cannot advance, then Team B Nor can he be promoted. Bai said: No matter whether Team A can be promoted, Team B cannot be promoted. Xia Mou said: Team B can be promoted, but Team A cannot be promoted. Deng said: I see that these teams can't qualify for the game. The prediction of only one of the four fans is correct. Based on the above, which of the following must be true? ["Bai's prediction is correct.", "Deng's prediction is correct.", "If Team A can advance, then Fang's prediction is correct.", "If Team A cannot advance, then Fang's prediction is correct."]