Two bonds have par values of $1,000. Bond A is a 5% annual-pay, 15-year bond priced to yield 8% as an annual rate; the other (Bond B) is a 7.5% annual-pay, 20-year bond priced to yield 6% as an annual rate. The values of these two bonds would be:
　　Bond A　　　　Bond B

A.$740.61　　　　$847.08

B.$740.61　　　　$1,172.04

C.$743.22　　　　$1,172.04