XYZ Telecom has a target capital structure of 50% common stock, 40% debt, and the rest in the form of preferred stock. XYZ Telecom's cost of common equity is 18%, its cost of preferred stock is 9.2%, and the firm's cost of debt is 8%. What is the firm's Weighted Average Cost of Capital given a marginal tax rate of 35%?

A. 9.06%

B. 11.73%

C. 12.00%

D. 13.12%

E. 15.00%