After-tax cost of debt is equal to (Cost of Debt) x (1 Tax Rate). Why do we have to multiply by (1 Tax Rate) to find the cost of debt but not to find the cost of equity? a. A company does not have to pay dividends to bondholders like it does to stockholders. b. A company has to pay the coupon to the bondholders. c. Bonds create a tax shield for a company. d. Both a and b