Your vessel is going from a warm climate to a cold climate with a hygroscopic cargo. Which statement is true?（）.

A. You must ventilate constantly and vigorously to combat ship sweat 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