Suppose an investor with a tax bracket of 30% has a choice between a corporate bond with a 8.5% coupon and a municipal bond with a 6.75 % coupon. Assuming that the two bonds are of the same grade, the _____ bond is more attractive because the muni bonds equivalent taxable yield is _______.

A. muni; 8.78%

B. corporate: 8.78%

C. muni; 9.64%

D. corporate; 9.64%