The correct answer is A) Light fuel oils. Light fuel oils, such as gasoline and kerosene, have a flash point below 150°F, which is the temperature at which the fuel can ignite. This is important to know for safe handling and storage of these flammable petroleum products. The other options (B, C, and D) all have higher flash points above 150°F, making them less flammable and safer to handle. Lubricating oils, road oils, and asphalt are generally heavier and less volatile than light fuel oils.