What common feature is found on both liquid-desiccant and solid-desiccant cargo- hold dehumidification systems?

Correct Answer: Option C — Both systems require a continuous source of heat to drive the moisture out of the desiccant.

Both liquid and solid desiccant systems rely on a thermal regeneration process to remove moisture from the desiccant material. Heat is required to drive the adsorbed or absorbed water out of the desiccant, allowing it to be reused for continuous dehumidification of the cargo hold air supply.