How much fuel is approximately carried when the boat is full?

The correct choice indicates that the boat carries approximately 186 kg of fuel when full. This answer is supported by the understanding of fuel capacity in relation to the boat's design specifications and operational requirements. The specific weight of fuel can vary slightly, but a typical conversion rate for diesel fuel is around 0.85 kg per liter. If the boat has a specified capacity or design that aligns with about 220 liters of fuel, this would approximately translate to 186 kg, considering the density of the fuel.

Additionally, while other options suggest different weight capacities, they either exceed normal fuel capacities or do not align with standard measures for such vessels. Therefore, the choice of 186 kg indicates an accurate and practical estimate for the full fuel capacity of this boat type, reflecting industry standards and safety considerations for operational efficiency.