The nurse detects a possible extra heart sound while assessing an adult client. To verify this finding, which action should the nurse take?

A. The bell of the stethoscope is best for detecting low-pitched sounds like murmurs or extra heart sounds. B. A Doppler ultrasound is not necessary for routine auscultation of heart sounds. C. Pulse oximetry does not provide relevant information about heart sounds. D. Auscultating with the diaphragm is better for high-pitched sounds, so the bell is preferred for extra heart sounds.