Question: A 40-year-old female patient with a history of hypertension presents for a routine examination. Auscultation of the chest reveals a pansystolic murmur best heard at the cardiac apex, radiating to the axilla. The murmur is high-pitched and blowing. Which of the following is the most likely etiology of the murmur? A. Mitral regurgitation B. Aortic regurgitation C. Mitral valve prolapse D. Aortic stenosis