A 72-year-old woman dies of congestive heart failure. The aortic valve is examined at autopsy (shown in the image). Which of the following is the most likely cause of aortic stenosis in this patient?
A.
Acute bacterial endocarditis
B.
Aging-related degeneration
C.
Chronic rheumatic valvulitis
D.
Congenital bicuspid valve
E.
Hypertrophic cardiomyopathy