what is the WACC?

1. A firm has a target debt-to-equity ratio of 1. Its cost of equity equals 12 percent, the cost of debt is 8 percent, and the tax rate is 30 percent. What is the weighted average cost of capital (WACC)? a) 10.0 percent. b) 10.8 percent. c) 9.8 percent. d) 8.8 percent