A firm has 12,000 shares of common stock outstanding with a book value of $20 per share and a market value of $39. There are 5,000 shares of preferred stock with a book value of $10 and a market value of $26. There is a $400,000 face value bond issue outstanding that is selling at 87% of par. What weight should be placed on the preferred stock when computing the firm's WACC? A. 7.25% B. 13.74% C. 11.48% D. 15.09%