Which class of WHMIS includes biohazardous infectious materials?

The correct answer identifies that biohazardous infectious materials are categorized under Class D of WHMIS (Workplace Hazardous Materials Information System). This classification is specifically focused on materials that can pose various health risks to workers, including infectious agents that can cause disease in humans or animals.

Class D includes several subdivisions that address different types of health hazards. For instance, it encompasses pathogens that are capable of causing infections, thus classifying them as biohazardous. This is crucial in a workplace setting where exposure to these materials could lead to serious health outcomes. The rationale for this categorization is to ensure that individuals working with or around these materials are aware of the risks and the necessary safety protocols to follow.

Understanding this classification helps in implementing appropriate safety measures and handling procedures, thereby protecting workers from potential exposure to hazardous biological agents.