During the class, the teacher brought a piece of ore to let the three students A. B, and C identify. A said, "This is not iron or lead. " B said, "This is not iron, but copper. " C said: "This is not copper, but iron. " The teacher concluded: "One of the three people made both judgments correctly; the other person made both judgments wrong, and one person made two judgments wrong. ". Based on the above conditions, which of the following can be inferred to be true? ? ['This ore is tin.', 'This ore is copper.', 'This ore is lead.', 'This ore is iron.']