Why is the formula for a perpetuity/consol useful for coupon bonds with long maturity?

A)	It becomes tedious to calculate the present value of numerous coupon payments so the perpetuity formula is a good approximation.

B)	It is unlikely that a person will still be alive to receive coupon payments in 50 years so the perpetuity formula is a good approximation.

C)	The present value of coupon payments in the distant future is very small so the perpetuity formula is a good approximation.

D)	I'm not really sure, that's just what you told us in class.