Answer :
Both Technician A and B present valid techniques for relieving fuel pressure in an EFI car, with A using a gauge and B disabling the fuel pump and running the engine dry. Therefore, the correct answer is option c.
Technician A is correctly connecting a pressure gauge to the fuel rail to help relieve and measure the pressure from the system. Technician B is disabling the fuel pump and allowing the car to run until it stalls, which effectively uses up the remaining fuel in the system, relieving pressure. Both methods are professional and achieve the goal of reducing fuel pressure, but they should be performed with caution and adherence to safety protocols. Therefore, the correct answer is c. Both A and B.
