Which of the following is listed as a hazmat type?

• A. Aerosols
• B. Oxidizers
• C. Corrosives
• D. Flammable

Answer: (D)

Hazmat types are used to categorize materials so you know what safety rules and labeling apply. Among these options, the one that fits as a hazmat type is flammable because it denotes substances that ignite easily and must be kept away from heat, sparks, and open flames. That classification drives specific handling, storage (such as using approved flammable cabinets), labeling, and PPE requirements.

Aerosols are more about packaging form in many systems, oxidizers are a hazardous class that describe materials that can intensify fires, and corrosives describe substances that can destroy skin or metal. While those are real hazards, the question is pointing to the hazmat type designation, which is most typically represented by flammable in this context.