6. If the CFO of a company decides to retire some of the company's debt by issuing equity, assuming the existence of corporate tax, which of the following is true? A. The WACC of the company does not change because the value of the company does not change. B. The WACC of the company changes but the value of the company does not change. C. The required rate of return on the assets of the company changes because the value of the company changes. D. The required rate of return on the assets of the company does not change because the value of the company does not change. E. None of the above