Which of the following statements correctly describes a company's cost of debt used in the WACC calculation? A. It is the interest rate currently being paid on all outstanding interest-bearing long-term debt. B. It is the yield to maturity on all interest-bearing long-term debt outstanding. C. It is the yield to maturity on all interest-bearing short-term and long-term debt. D. It is the yield to maturity on all long-term liabilities