A company's balance sheet showed the following amounts for liabilities and stockholders' equity accounts: Current Liabilities, $50,000; Bonds Payable, $600,000; Long-Term Lease Obligations, $120,000; and Deferred Income Tax Liability, $20,000. Total stockholders' equity was $520,000. What is the debt-to-equity ratio? a. 1.42 b. 1.52 c. 0.70 d. 0.66