Technician a Says That a Partially Stuck-Open EGR Valve Can

Technician A says that a partially stuck-open EGR valve can cause ping (spark knock) during wide-open throttle engine operation. Technician B says that a partially stuck-open EGR valve could cause the engine to stall while operating at idle speed. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Correct Answer:

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