A 42-year-old healthy man presents with increasing dyspnea, lower extremity edema and fatigue. He denies chest pain, palpitations or syncope. Physical examination reveals a II/IV early diastolic short murmur with a systolic ejection click. There is also a II/IV diastolic murmur at the cardiac apex. Which of the following is the most likely finding on echocardiography?
A. Aortic stenosis
B. Aortic regurgitation
C. Mitral valve stenosis
D. Pulmonic valve regurgitation
E. Atrial septal defect