The correct answer is B) Gasoline. The small passenger vessel regulations prohibit the use of gasoline for cooking on vessels carrying passengers for hire. This is due to the highly flammable and volatile nature of gasoline, which poses a significant fire hazard on vessels with passengers onboard. The regulations require the use of safer fuels such as wood, coal, or kerosene for cooking purposes to minimize the risk of accidents and ensure the safety of passengers. The other options, A) Wood, C) Coal, and D) Kerosene, are acceptable fuels that can be used for cooking on small passenger vessels, as they are generally less volatile and present a lower fire risk compared to gasoline.