The chapter on financial leverage, as well as the discussion in class, used "risk units to illustrate what about financial leverage? a. That firm value is maximized where the cost of capital is minimized b. That the risk of the firm's assets cannot be changed by shifts in financial leverage C. That debt is risk free d. That debt financing creates a tax shield and therefore lowers firm risk e. That for firms with leverage, the higher the EBIT, the higher is firm risk