Taggart Transcontinental currently has no debt and an equity cost of capital of 16%. Suppose that Taggart decides to increase its leverage and maintain a market debt -to-value ratio of 1/3. Suppose Taggarts debt cost of capital is 9% and its corporate tax rate is 35%. Assuming that Taggarts pre-tax WACC remains constant, then with the addition of leverage its effective after-tax WACC will be closest to:

A) 13.0% B) 16.0% C) 15.0% D) 12.9%