A vessel in ocean service that does not ha
题型：单项选择题
问题：
A vessel in ocean service that does not have an approved means of processing oily bilge slops or oily ballast must have（）.
A.a fixed piping system for ballast discharge to a reception facility
B.a discharge outlet for the ballast system on each side of the weather deck
C.one portable adapter for a shore connection to the ballast line
D.All of the above