Concerning cargo-hold dehumidification, what statement is true?

Correct Answer: Option D — Cargo hold moisture content is reduced by supplying relatively dry air from the outside and exhausting relatively humid air to the outside.

Cargo hold dehumidification functions by replacing moist hold air with drier outside air. By exhausting the humid air and supplying air with a lower moisture content, the overall dew point within the hold is reduced, preventing condensation on cargo surfaces and protecting against moisture-related damage during transit.