A Rubber or Plastic Ring Should Be Around the Bell

Multiple Choice

A rubber or plastic ring should be around the bell endpiece of a stethoscope to

A) prevent the transmission of static electricity.
B) avoid cold metal from touching the patient.
C) prevent the sharp edge of the stethoscope from damaging the patient's skin.
D) allow firm pressure to be applied without discomfort.
E) ensure secure contact with the body surface.