To Auscultate for S₃ or S₄ gallops in the Mitral

To auscultate for S₃ or S₄ gallops in the mitral area,the nurse listens with the

A) bell of the stethoscope with the patient in the left lateral position.
B) diaphragm of the stethoscope with the patient in a supine position.
C) bell of the stethoscope with the patient sitting and leaning forward.
D) diaphragm of the stethoscope with the patient lying flat on the left side.