By definition, combustible liquids are liquids which __________.

Correct Answer: Option A — have a flash point of 80°F or higher

Per 46 CFR 30.10-15, combustible liquids are defined by having a flash point of 80°F or higher. This classification distinguishes them from flammable liquids, which have lower flash points and present a significantly higher risk of ignition at ambient temperatures encountered during routine shipboard operations.