Two Technicians Are Discussing EGR Monitor

Multiple Choice

Two technicians are discussing EGR monitor. Technician A says that under the correct operating conditions, the OBD manager may briefly open the EGR valve and measure the drop in turbocharger speed against expected values. Technician B says that during monitoring, the turbocharger speed will drop because combustion temperature is cooler at low EGR flow rates. Who is right?

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