C. d. 14. It is between 4 and It is more than 8%. In a world with taxes and bankruptcy cost, if Vortex (information in Problem 13) decided to reduce its use of debt from 50% to 30% and to increase the percent of common stock to 60%, all the rates remained unchanged, then: Vortex's WACC would rise b. Vortex's WACC would decline Vortex's WACC would not change d. The WACC is just a fictional idea a. C. by the