Answer:
The correct answer is letter "D": Neither Technician A nor Technician B.
Step-by-step explanation:
While cleaning break components no fuels must be used because they are flammable. For that purpose, there are commercial fluids made of tetrachloroethylene which is an industrial solvent useful to degrease metal components. Tetrachloroethylene comes in a spray presentation that is non-flammable and fast-drying and is widely used by the service shops of major dealerships.
Thus, neither Technician A or B ar correct in the use of fuels to clean brake components.