MM Proposition II with taxes: Group of answer choices explains how a firm's WACC increases with the use of financial leverage. reveals how utilizing the tax shield on debt causes an increase in the value of a firm. supports the argument that business risk is determined by the capital structure employed by a firm. supports the argument that the cost of equity decreases as the debt-equity ratio increases. reaches the final conclusion that the capital structure decision is irrelevant to the value of a firm.