Doris Wade purchased a condominium for $50,000 in 1980. Her down payment was $10,000. She financed the remaining amount as a $40,000, 30-year mortgage at 8%, compounded monthly. Her monthly payments are $200. It is now 2000 (20 years later) and Doris has sold the condominium for $100,000, immediately after making her 240th payment on the unit. Find her effective annual internal rate of return on this investment Choose the closest answer below. OA. 5.5% O B. 7.6% OC. 9.8% OD. 3.1%