Technician a Says the EVAP Monitor for an OBD-II System

Technician A says the EVAP monitor for an OBD-II system determines whether there is sufficient purge flow by varying the purge solenoid duty cycle while monitoring change in STFT. Technician B says the canister vent solenoid must be open during the EVAP pressure test portion of the monitor. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Correct Answer:

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