Your tank vessel is fully loaded, and you find that she is down slightly by the head. To adjust the trim, you may（）.

A.add ballast forward
B.load more cargo forward
C.shift bunkers forward
D.All of the above

A.sagging with tensile stress on main deck
B.sagging with compressive stress on main deck
C.hogging with tensile stress on main deck
D.hogging with compressive stress on main deck

A.You must ventilate constantly and vigorously to combat ship sweat A.Press up the slack No.1 starboard double bottom tank
B.You should ventilate; there is little danger of ship sweat, but a possibility of cargo sweat
C.There is danger of heavy cargo sweat if you ventilate
D.There is little danger of any sweat problem