Eventide, Inc., has 10-year bonds with a total market value of $15,000,000 and 15-year bonds with a total market value of $55,000,000. The pretax costs are 11% and 4%, respectively. The firm also has common stock with a total market value of $75,000,000 and a pretax cost of 13%. The tax rate is 21%. What is the firm's WACC?
A) 8.82
B) 7.41
C) 9.38
D) 9.58
E) 9.33