Aqueous Film Forming Foam (AFFF), commonly known as 'light water', is especially suitable for fighting __________.

Correct Answer: Option B — oil fires in the engine room bilges

Aqueous Film Forming Foam creates an aqueous seal over flammable liquid spills, floating on fuel to suppress vapors and extinguish Class B fires. This makes AFFF uniquely effective against flowing oil fires typical in machinery space bilges per marine firefighting standards.