The General Store has a cost of equity of 15.8 percent, a pre-tax cost of debt of 7.7 percent, and a tax rate of 32 percent. What is the firm's weighted average cost of capital if the debt-equity ratio is 0.40?

A. 10.18 percent

B. 11.72 percent

C. 12.78 percent

D. 13.30 percent

E. 14.93 percent