What are the two categories of hazardous materials?

Answer: B — Flammable and non-flammable materials

The two primary categories of hazardous materials are typically classified based on their potential hazards. The correct distinction lies in the classification of materials as flammable and non-flammable. Flammable materials are substances that can easily ignite and combust, posing a significant risk in transportation and storage. This includes things like gasoline, certain solvents, and some chemicals that are volatile. Understanding the flammability of substances is crucial for ensuring proper handling, storage, and transportation, as they require specific measures to manage the risks associated with fire and explosion. Non-flammable materials, on the other hand, don't ignite easily or do not burn in typical conditions. While they might still pose other hazards – such as being toxic or reactive – they do not have the specific risk associated with combustion. This classification is vital for transport regulations and safety measures, ensuring that drivers and handlers take the necessary precautions to maintain safety while dealing with hazardous materials.