You have a group of HVAC mechanics working for a department within your company. They want to start selling and installing a new composite board insulation that is highly efficient at insulating ductwork. However, after reviewing the materials you realize that the material can present a contact/skin and respiratory hazard to the installer. What would be the best method to train these employees on the required method of handling and installing to reduce the hazards to themselves and their clients? Conference Method Virtual Reality training Lecture method Demonstration method