For a corporation, a debt-to-enterprise value ratio was calculated to be 65.0%, this value means: a. the corporation's stock is overvalued by 65.0%, b. the corporation is earning 56.0% of necessary to meet its required interest payments c. shows the fraction of each dollar in revenues that is available to equity holders after the firm pays interest and taxes is 65.0%, d. the extent to which corporations relies on debt as a source of financing is 65.0%, e. None of the above