14. Which of the following is NOT an indication for aortic valve replacement in the setting of severe aortic regurgitation?

A. Asymptomatic with ejection fraction of 40%

B. Asymptomatic with left ventricular end-diastolic diameter of 7.5 cm

C. Asymptomatic from a bicuspid aortic valve and normal systolic function

D. Asymptomatic with a left ventricular end-systolic diameter of 6.0 cm