276. After the removal of bulk water from damaged insulation space, Why is it so important to dry out the spaces until the atmosphere dew point is -40°C or lower

A. As there is a possibility for water being trapped and remaining in the insulation spaces
B. As there is a posisbility of mud collected at the bottom of the insulation spaces
C. To cool down the cargo tanks for immediate loading of cargo
D. To avoid the accumulation of rust dust at the bottom of the insulation space