The key elements of WHMIS are:*1 pointWorker education and trainingLabelsSafety Data SheetsAll of the above

The Workplace Hazardous Materials Information System (WHMIS) is a comprehensive communication standard for hazardous materials in Canada. Its key elements include:

1. Worker Education and Training: It is essential that employees understand the hazards of the materials they are working with and how to protect themselves.

2. Labels: Proper labeling of hazardous materials helps workers identify the chemical and understand the risks involved. Labels provide critical information, including the nature of the hazard and safety precautions.

3. Safety Data Sheets (SDS): These documents contain detailed information about the hazardous material, including its properties, hazards, safe handling procedures, and emergency measures.

Given these points, the correct answer is All of the above, as each element plays a crucial role in ensuring safety in the workplace regarding hazardous materials.