Which one of these statements is correct for a levered firm, assuming MM Proposition I with tax and bankruptcy costs? A. An increase in tax rates will always decrease the value of the firm. B. An increase in financial distress costs always increases the value of a firm. C. To obtain its maximum value, a firm should select an all-equity capital structure. D. The value of a firm is maximized when its cost of capital is also minimized. E. There is no optimal level of debt for the static trade-off theory