-How do the shops make money if they sell at such low prices?

-Manufacturers, it seems, are willing to bring down prices ________ big volume purchases.[ ]

A. under the name of   

B. on behalf of

C. in return for   

D. in preparation for

船舶破舱进水时，应通知机舱迅速排水，采取正确有力的堵漏抢修措施。下述哪项不是决定排水次序的依据（）

A.漏洞大小

B.漏洞位置

C.舱底水总管的内径

D.险情发展势头