Which of the following is true?

• A. The after-tax cost of debt is the debtholders required rate of return multiplied by (1-tax rate).
• B. The price of common stock increases if the expected growth rate of dividends increases, all else equal.
• C. The price of preferred stock increases if the required rate of return on the preferred stockholder decreases, all else equal.
• D. The cost of preferred stock can increase if net proceeds per preferred share decreases.
• E. All of the above