Assume Ford Motor Company is discussing new ways to recapitalize the firm and raise additional capital. Its current capital structure has a 15% weight in equity, 25% in preferred stock, and 60% in debt. The cost of equity capital is 18%, the cost of preferred stock is 9%, and the pretax cost of debt is 7%. What is the weighted average cost of capital for Ford if its marginal tax rate is 25%? A) 8.51% B) 8.91% C) 7.70% D) 8.10%