How is an inert gas system designed to reduce the possibility of tank explosions?

Correct Answer: Option C — by reducing the oxygen concentration below levels necessary for combustion

Inert gas systems function by displacing oxygen with non-combustible gases, typically flue gas. By reducing the oxygen concentration below the level necessary for combustion, the system effectively eliminates the fire triangle, preventing the ignition of flammable hydrocarbon vapors within the cargo tanks during loading, discharge, and transit.