Which of the following statements concerning the MM extension with growth in NOT correct?

a. The value of a growing tax shield is greater than the value of a constant tax shield.

b. For a given D/S, the levered cost of equity is greater than the levered cost of equity under MM's original (with Tax) assumptions.

c. For a given D/S, the WACC is greater than the WACC under MM's original (with tax) assumptions.

d. The total value of the firm is independent of the amount of debt it uses.

e. The tax shields should be discounted at the unlettered cost of equity.