All of the Following Statements Are True EXCEPT

All of the following statements are true EXCEPT:

A) A spark plug that is not torqued to the correct specification can misfire.
B) A spark plug can overheat if not tightened correctly or if a tapered plug seat is dirty.
C) double plat spark plug life is estimated to be 100,000 miles.
D) on modern engines, spark plug cleaning is extremely cost effective.