29. The Canadian Workplace Hazardous Materials Information System (WHMIS) contains class and division hazard symbols for different types of hazards (eg. Class B are Flammable Materials, which are symbolized by a circle with a ame inside). A circle with a skull and crossbones inside therefore represents A. Class D (Poisonous and Infectious Material) B. Class C (Oxidizing Material) C. Class E (Corrosive Material) D. Class F (Dangerously Reactive Material) E. Class B (Flammable and Combustible Material)