The Market Value of Glenwood's Debt and Equity Capital Totals

The market value of Glenwood's debt and equity capital totals $180 million, 80% of which is equity related. An analysis conducted by the company's finance department revealed a 7% after-tax cost of debt capital and a 10% cost of equity capital. On the basis of this information, Glenwood's weighted-average cost of capital:

A) is 7.6%.
B) is 8.5%.
C) is 9.4%.
D) cannot be determined based on the data presented because the cost of debt capital must be stated on a before-tax basis.
E) cannot be determined based on the data presented because the cost of equity capital must be stated on an after-tax basis.