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 maintains a .5 debt to equity ratio,then Flagstaff's pre-tax WACC is closest to:

A) 10.5%.
B) 11.0%.
C) 9.0%.
D) 10.0%.