Traditionally, large consignors/shippers build factories and warehouses near rail lines and have a section of track of their own called a _________, where goods are loaded onto or unloaded from rail cars. 传统上，大型运输公司在铁路线附近建造工厂和仓库，他们有自己的一段轨道叫做_______,在那儿从铁路车厢上装卸货物。
A、locomotives 机车
B、siding 旁线
C、turnout道岔