Use the Information for the Question(s) Below

Use the information for the question(s) below.
Flagstaff Enterprises is expected to have free cash flow in the coming year of $8 million, and this free cash flow is expected to grow at a rate of 3% per year thereafter. Flagstaff has an equity cost of capital of 13%, a debt cost of capital of 7%, and it is in the 35% corporate tax bracket.
-If Flagstaff currently maintains a .5 debt to equity ratio,then Flagstaff's after-tax WACC is closest to:

A) 10.00%
B) 10.20%
C) 9.50%
D) 8.75%