Which of the Following Statements Best Describes Optimal Capital Structure

Which of the following statements best describes optimal capital structure?

A) As a rule, the optimal capital structure is found by determining the debt-equity mix that maximizes expected EPS.
B) The optimal capital structure simultaneously maximizes EPS and minimizes the WACC.
C) The optimal capital structure simultaneously minimizes the cost of debt, the cost of equity, and the WACC.
D) The optimal capital structure simultaneously maximizes common share price and minimizes the WACC.