McQuinty, Inc. has a beta of 1.34 and a marginal tax rate of 31%. The company has one bond issue outstanding with a total face value of $750,000. The bonds are currently quoted at 98.6. These bonds have seven years to maturity, a 6% coupon rate, and pay interest semi-annually. What is the after-tax cost of debt for McQuinty, Inc.? A. 4.14% B. 4.31% C. 5.16% D. 5.55% E. None of the above