All of the Following Statements Are True EXCEPT

All of the following statements are true EXCEPT:

A) fumes from some types of silicone RTV sealants used on the engine can contaminate O₂ sensors.
B) lead in fuel can contaminate an O₂ sensor.
C) if the pores of an O₂ sensor become plugged, its response time and output voltage will increase.
D) carbon buildup on an O₂ sensor can be from an overly rich air-fuel mixture, engine oil consumption, or a bad turbocharger turbine seal.