Technician A says that if the engine stalls and the ignition switch is on, the one-way check valve prevents fuel flow from the pump to the fuel filter and fuel system. Technician B says that when the engine is shut off, the one-way check valve prevents fuel flow from the underhood fuel system components into the fuel pump and tank. Who is correct?
A. Technician A
B. Technician B
C. Both A and B
D. Neither A nor B
Answer: B
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