When carrying out mooring trial, the （） trial of the MEis not necessary.

A.generator sets running trial
B.shafting intensity trial
C.the trail for pumps that working for ME
D.ME safety devices trial

A.starting and direction changing trial
B.cancelling accelerating function trial
C.lowest stable speed trial
D.continuous running trial

A.chief engineer
B.surveyor
C.the engineer
D.the technique personnel of the shipyard