The weighted average cost of capital is defined as the weighted average of a firm's: Select one: a. dividend and capit gains yields. b. cost of equity and its after-tax cost of debt. O c. return on its investments. O d. bond coupon rates. e. pretax cost of debt and equity securities. Choose the best answer for the following statement: The improper use of leverage can lead to: Select one: a. Insolvency b. Bankruptcy c. Lower profitability d. A and B but not C O e. All of the above f. According to Modigliani and Miller, the use of leverage has no affect on the firm's performance