An inert gas system is designed to reduce the possibility of tank explosions by __________.

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

Inert gas systems function by introducing gas with a low oxygen content—typically below 8%—into the cargo tanks. By displacing the oxygen, the atmosphere is rendered incapable of supporting combustion, thereby preventing explosions even if a source of ignition is present within the cargo tank environment.