Technician a Says That When the Voltage Output of an Air/fuel

Multiple Choice

Technician A says that when the voltage output of an air/fuel ratio sensor shifts below 3.3 V, it indicates a rich air/fuel mixture ratio. Technician B says that when the voltage output of an air/fuel ratio sensor shifts below 3.3 V, it indicates a lean air/fuel mixture ratio. Who is correct?

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