（)provides strength and storage space for fuel，lubricating oil，fresh water，salt（ballast)wa

()provides strength and storage space for fuel，lubricating oil，fresh water，salt(ballast)water and potable water.

A.The double bottom

B.The cofferdam

C.The navigating bridge

D.The superstructure

请帮忙给出正确答案和分析，谢谢！