Alpha has an outstanding bond issue that has a 7.75% semiannual coupon, a current maturity of 20 years, and sells for $967.97. The firm's income tax rate is 40%. What should Alpha use as an after-tax cost of debt for cost of capital purposes?
A) 2.42%
B) 4.04%
C) 4.85%
D) 8.08%