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Shipboard Oil Pollution Emergency Plans must be reviewed（）.
A:annually by the owner，with a letter submitted six months before expiration
B:only once every five years，with a letter submitted six months before expiration
C:and the entire plan resubmitted for approval once every five years，six months before expiration
D:annually by the owner，with a letter submitted to the Coast Guard within one month of the anniversary date of the plan approval

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出自：海船船员证

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