49. The school organizes inter-class volleyball competition, using a double-elimination
system. There are 15 teams participating. How many games are needed at least to
determine the championship?
(A) 27 (B) 28 (C) 29 (D) 30
52. In volleyball match, each team has the right to designate up to two “players” who are
dedicated to defend among the registered players. This role can be called?
(A) spiker (B) libero (C) setter (D) game maker