You Feel Discomfort and Possibly Pain When the Dentist Drills

Multiple Choice

You feel discomfort and possibly pain when the dentist drills a hole in your tooth because the

A) heat of the drilling process is felt by the gum tissue.
B) pulp cavity contains nerves.
C) tooth decay has invaded the pulp cavity.
D) dentist is applying too much pressure to the drill.
E) decay has affected the dentin.