Sorensen Systems Inc. is expected to pay a $2.50 dividend at year end (D1 = $2.50), the dividend is expected to grow at a constant rate of 5.50% a year, and the common stock currently sells for $52.50 a share. The before-tax cost of debt is 7.50%, and the tax rate is 40%. The target capital structure consists of 45% debt and 55% common equity. What is the companys WACC if all the equity used is from retained earnings?

A. 7.07%

B. 7.36%

C. 7.67%

D. 7.98%

E. 8.29%