Bunker "C" is classified as a grade __________.

Correct Answer: Option C — E liquid

Under 46 CFR 30.25-1, petroleum products are classified by their flash point. Bunker C, a heavy residual fuel oil, has a flash point above 150°F (65.6°C), placing it in the Grade E category. This classification dictates specific handling, storage, and fire protection requirements for the vessel's fuel systems.