Select the best answer for the question. Two technicians are discussing diesel engine operation. Technician A says that the speed of the engine is...

Select the best answer for the question.2.  Two technicians are discussing diesel engine operation. Technician A says that the speed of the engine is controlled by the position of the throttle valve. Technician B says that ignition in the diesel engine cylinder occurs when the fuel is injected. Who is correct? 

       A. Neither Technician A nor Technician B is correct.   B. Both Technician A and Technician B are correct.   C. Only Technician B is correct.   D. Only Technician A is correct.