Use the Information for the Question(s)below

Use the information for the question(s) below.
Flagstaff Enterprises 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 has a 35% corporate tax rate.
-If Flagstaff currently maintains a debt to equity ratio of 1,then Flagstaff's after-tax WACC is closest to:

A) 10.25%.
B) 10.00%.
C) 9.50%.
D) 9.25%.