What is the significance of the exhaust gas recirculation (EGR) system in modern vehicles?

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A) It reduces nitrogen oxide (NOx) emissions by recirculating a portion of the exhaust back into the engine’s intake.

B) It improves fuel efficiency by altering the air-fuel mixture entering the engine.

C) It enhances engine performance by increasing the amount of air entering the combustion chamber.

D) It filters out harmful particles from the exhaust before they exit the vehicle.

Quiz: What is the significance of the exhaust gas recirculation (E