On a vessel proceeding from a very cold to a warm climate with a cargo of a nonhygroscopic nature in the holds，which is TRUE?（）.
- ADanger of heavy ship sweat exists； constant and vigorous ventilation is required
- BThere is danger of heavy cargo sweat if outside air is introduced by ventilation
- CThere is little danger of ship's sweat，slight possibility of cargo sweat； moderate ventilation is needed
- DThe possibility of any sweat problem，either cargo or ship，is remote