There are also deputy station master in charge of train operation, operation director, operation duty man, assistant duty man, yardmaster, coupling man, brake man and ____________________ in charge of vehicle number management. 设有分管列车运行的副站长、运行主任、运行值班员、助理值班员、调车长、连接员、制动员和____________________，负责车号管理。
A、train driver 火车司机
B、vehicle number taker 车号员
C、signal facility signalmen 信号设备信号员