Assume a firm employs debt in its capital structure. Which of the following statements is accurate? A. In the WACC calculation, the weight assigned to preferred stock decreases as the market value of the preferred stock increases. B. The WACC would most likely decrease if the firm replaced its proforrod stock with debt. C. The WACC will decrease as the corporate tax rate decreases. D. In the WACC calculation, the weight of equity is based on the number of shares outstanding and the book value per share. E. The WACC will remain constant unless a company retires some of its debt