please solve it fast ASAP

MM Proposition II is the proposition that O a. The cost of equity is equivalent to the required return on the total assets of a levered firm O b. The cost of levered equity depends solely on the return on debt, the debt-equity ratio, and the tax rate O c. A firm's cost of equity capital is a positive linear function of the firm's capital structure O d. Supports the argument that the capital structure of a firm is irrelevant to the value of the firm The use of leverage a. Increases the asset beta but does not affect the equity beta O b. Does not affect either the equity beta or the asset beta Increases both the equity beta and the asset beta O d. Increases the equity beta but does not affect the asset beta O c