A stock has just paid $4 of dividend. The dividend is expected to grow at a constant rate of 12% a year, and the common stock currently sells for $70. The before-tax cost od debt is 10%, and the tax rate is 20%. The target capital structure of 37% debt and 63% common equity. What is the companys WACC if all equity is from retained earnings? A.) 14.55% B.) 13.68% C.) 15.86% D.) 15.13% E.) 13.53%