Technician a says that the tinnerman nuts are used to hold the brake drum on and should be reinstalled when the drum is replaced. technician b says that a drum should be removed inside a sealed vacuum enclosure or washed with water or solvent to prevent possible asbestos dust from being released into the air. which technician is correct? a. technician a onlyb. technician b onlyc. both technicians a and bd. neither a nor b