Zhang Xiaomeng, Wang Bing, Li Ping, and Xu Xiaomei, the third-year seniors of Beishan No.1 Middle School, have entered the top eight of the school's badminton "torch cup" competition. The same grades of A. B, C, and D are arguing who is Can finally win the championship; A said: "Wang Bing, Li Ping is the most promising to win the championship. " B said: "Wang Bing, Li Ping is impossible to win the championship. " C said: "Zhang Xiaomeng is not in a good state of mind today, he must not win the championship. "Ding said," Xu Xiaomei can get the gold medal. "The result was unknown, and only one person guessed correctly. Excuse me, who is the winner of the badminton "torch cup"? ['Zhang Xiaomeng.', 'Wang Bing.', 'Li Ping.', 'Xu Xiaomei.']