Jay can purchase a $1,000 Municipal Bond with a coupon rate of 4% or a $1,000 Corporate Bond with a coupon rate of 6%. He is in the 37% tax bracket. Which bond will give him the highest after-tax return?

A. They both have the same after-tax return

B. The Corporate Bond with a 6% coupon rate

C. The Municipal Bond with a 4% coupon rate

D. Cannot tell from the information that is given.