Four years ago, you bought a home for $200,000. You paid $20,000 down and agreed to a 30-year mortgage with a 6% annual interest rate (APR). You have made regular monthly payments and periodic repairs that have kept the book value of your home at $200,000. Assuming the home is your only asset, what is your book debt-asset ratio?
a. 0.95 b. 0.90 c. 0.85 d. 0.80