The PSCO would be justified in making a detailed inspection of all life-saving appliances， if he sees that（）.

The PSCO would be justified in making a detailed inspection of all life-saving appliances， if he sees that（）.
A.the survival craft launching equipment have never been used
B.the pivot points are seized
C.the lashing or stowing of deck cargo is improper
D.All of the above signs are evident
正确答案：All of the above signs are evident