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