Which of the Following Statements Is CORRECT

Which of the following statements is CORRECT?

A) When a company increases its debt ratio, the costs of equity and debt both increase. Therefore, the WACC must also increase.
B) The capital structure that maximizes the stock price is generally
The capital structure that also maximizes earnings per share.
C) All else equal, an increase in the corporate tax rate would tend to
Encourage a company to increase its debt ratio.
D) Since debt financing raises the firm's financial risk, increasing a
Company's debt ratio will always increase its WACC.
E) Since debt is cheaper than equity, increasing a company's debt ratio will always reduce its WACC.