单选题When oily ballast has been pumped overboard，an entry must be made in the（）.AOil Record BookBOfficial LogbookCdeck rough logDengine rough log
单选题
When oily ballast has been pumped overboard，an entry must be made in the（）.
A
Oil Record Book
B
Official Logbook
C
deck rough log
D
engine rough log
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