Which of the following statements is CORRECT?a. WACC calculations should be based on the before-tax costs of all the individual capital components.b. Flotation costs associated with issuing new common stock normally reduce the WACC.c. If a company's tax rate increases, then, all else equal, its weighted average cost of capital will decline.d. An increase in the risk-free rate will normally lower the marginal costs of both debt and equity financing.e. A change in a company's target capital structure cannot affect its WACC.