Which of the following statements is correct? The historic cost of long-term debt is the appropriate cost of debt for WACC calculations All statements are correct If a firm is subject to income taxes, then the after-tax cost of debt for the firm will be less than the before-tax cost of debt The coupon rate of long-term debt is the appropriate cost of debt for WACC calculations when it is selling at a discount O Milton Corp. issued bonds 10 years ago with a coupon rate of 10 percent at a price of $1,000. The current price of the bonds is $980. The before-tax cost of the debt to the firm is still 10 percent