According to the regulations, to prevent excessive pressure buildup in cargo tanks containing LFG, they are fitted with __________.

Correct Answer: Option D — safety relief valves

Under Title 46 CFR Part 154, cargo tanks carrying liquefied flammable gas (LFG) must be fitted with approved safety relief valves. These valves are designed to automatically vent vapor to prevent catastrophic overpressurization of the pressure vessels due to environmental heat input or cargo boil-off.