Fighting a rig fire in a watertight compartment with hoses could reduce the stability of the rig by __________.

Correct Answer: Option B — causing a list due to the water in the compartment

Accumulation of firefighting water within an enclosed watertight compartment creates a high free surface effect and off-center weight, producing a severe list and reducing transverse stability, which can threaten the watertight integrity of the MODU.