The temper is likely to be drawn out from a chisel edge when you __________.

Correct Answer: Option D — grind it for long periods of time with excessive pressure

Excessive heat generated during grinding can draw the temper out of a chisel's cutting edge, softening the steel. This renders the tool ineffective and prone to rapid dulling. Proper technique requires light pressure and frequent cooling to maintain the tool's hardness and structural integrity for effective use.