题目内容
(请给出正确答案)
[单选题]
According to the MLC, each Member shall require that all ships that fly its flag have a sufficient number of seafarers on board to ensure that ships __()
A.are sailing safely
B.are operating efficiently
C.with due regards to ship safety
D.are operated safely, efficiently and with due regard to security
答案
D、are operated safely, efficiently and with due regard to security