Final answer:
The correct answer is D) flammable liquid, which has a specific range of flammability determined by its flash point and boiling point.
Step-by-step explanation:
A substance has a specific range of flammability if it ignites and burns under certain conditions. The correct answer is D) flammable liquid. Flammable liquids have a specific range of temperatures within which their vapors can form an ignitable mixture with air.
This range is known as the flammable range and varies depending on the substance's flash point and boiling point. Flammable solids, gases, and reactive flammable materials also have flammability properties, but the specificity of the range is most commonly associated with flammable liquids.
For example, waste liquids with flash points below 60 °C, like used solvents and waste oils, are considered flammable liquids because they can easily ignite at those temperatures. Option D) is the correct one.