In Auscultating for an S₄ with a Stethoscope,the Nurse Would

In auscultating for an S₄ with a stethoscope,the nurse would listen with the:

A) bell at the base,with the patient leaning forward.
B) bell at the apex,with the patient in the left lateral position.
C) diaphragm in the aortic area,with the patient sitting.
D) diaphragm in the pulmonic area,with the patient in the supine position.