Doris Wade purchased a condominium for $50,000 in 1985. Her down payment was $15,000 She financed the remaining amount as a $35,000, 35-year mortgage at 8%, compounded monthly. Her monthly payments are $220. It is now 2000 (15 years later) and Doris has sold the condominium for $100,000, immediately after makin her 180th payment on the unit. Find her effective annual internal rate of return on this investment Choose the closest answer below. O A. 3.1% OB. 10.1% OC. 4.1% OD 8%