what is the answer?

Question 9 V FLAG QUESTION A 60-year-old male presents for a routine exam. The NP auscultates the heart using both the diaphragm and bell of the stethoscope. What is the primary reason for using the bell at the apex and lower left sternal border? Answers: A - D A To detect systolic ejection murmurs O B To identify low-pitched sounds such as S3, $4, or mitral O stenosis murmur C To detect pericardial friction rubs O D To better hear high-pitched sounds like S1 and S2 O