Which of the following statements is CORRECT? Ob When calculating the cost of preferred stock, a company does not need to adjust for taxes, because preferred stock dividends are not deductible by the paying corporation All else equal, an increase in a company's stock price will increase its marginal cost of retained earnings, Is All else equal, an increase in a company's stock price will increase its marginal cost of new common equity, To Since the money is readily available, the after-tax cost of retained earnings is usually much lower than the after-tax cost Od of debt