Technician A says that an oxygen sensor can have one, two, three, ...

[debasdf]

Technician A says that an oxygen sensor can have one, two, three, four, or more wires, depending on the style and design. Technician B says that if the exhaust has little oxygen, the voltage of the oxygen sensor will be close to 1 volt (1000 mV) and close to zero if there is high oxygen content in the exhaust. Who is right?
◦ Technician A only
◦ Technician B only
◦ Both technicians A and B
◦ Neither technician A nor B

[trog]

Both technicians A and B

[debasdf]

TYSM

[shewald78]

Thanks for the timely response, appreciate it