Mr. Chin is an 82-year-old man who comes to your office for a routine check. On examination, you notice a somewhat high-pitched murmur in the second right intercostal space during systole. It does not radiate and the rest of his examination is normal for his age. Which is true of the most likely cause of this murmur?

A) It often decreases carotid upstroke.
B) It carries with it increased risk for cardiovascular disease.
C) It is usually accompanied by an S3gallop.
D) It is found in 10% of otherwise normal elderly patients.