Firm ABC has a current capital structure of $45.3M in Common Stock and $18.3M in Coupon Bonds. The bonds have a YTM of 6.4% and firm has a tax rate of 35%. If the firm calculates a WACC of 7.2%, what is the cost of common stock? A) 8.43% B) 7.52% C) 10.24% D) 6.51%