The answer is "B. Proper training on respirators".
A respirator is a device intended to shield the wearer from breathing in particulate issue, including airborne microorganisms, exhaust, vapors and gases. There are two principle classifications: the air-decontaminating respirator which powers polluted air through a sifting component, and the air-provided respirator in which a substitute supply of outside air is conveyed. Inside every classification, distinctive methods are utilized to diminish or wipe out poisonous airborne contaminants.