While Two Technicians Are Discussing the Purpose of a Second

While two technicians are discussing the purpose of a second electrical control valve, which regulates fuel volume supplied to the inlet of the high-pressure pump, Technician A says the VCV helps reduce fuel consumption. Technician B says the VCV is needed to reduce emissions. Who is correct?

A) Technician A"
B) Technician B"
C) Both A and B
D) Neither A nor B"