A tankship has 40 gallons of 6% foam concentrate aboard. Approximately how much foam solution can be produced from this supply?

Correct Answer: Option C — 667 gallons

To find the total foam solution produced from a 6% concentrate, divide the volume of concentrate by the proportion: 40 gallons divided by 0.06 equals 666.67 gallons, which rounds to 667 gallons. This adheres to standard marine firefighting calculations for foam systems under 46 CFR.