Part of Southeast Asia was struck by floods, __________ effects the people are still suffering from.[ ]

A. which

B. whose

C. its

D. what

一般来讲，高水平物流服务必由高物流成本所支撑。因此，在加强物流服务管理的同时，明确相应的服务成本，从而保持成本与服务之间的一种均衡关系。