Which of the following is usually true concerning the cost of capital (the weighted average cost of capital or WACC)?

A. The WACC(or cost of capital) is generally less than the cost of debt

B. The Weighted Average Cost of Capital should be considered constant over time and does not change with market conditions or changes in the firm

C. The WACC (or cost of capital) is generally less than the cost of equity

D. It does not matter if you use the market values or book values for the amounts of each type of financing