单选题Accordingtoharmonised1988Protocol，thedurationofpassengerShipSafetyCertificateshallnotexceedg：（）A 5yearsB 36monthsC 24monthsD 12months
题目
单选题
Accordingtoharmonised1988Protocol，thedurationofpassengerShipSafetyCertificateshallnotexceedg：（）
A
5years
B
36months
C
24months
D
12months