Mitchell and Debbie Dixon, a married couple, sell their personal residence to Sophie. Sophie pays $225,000 and assumes their $70,000 mortgage. To make the sale the Dixons pay $4,000 in commissions and $1,000 in legal costs. The couple has owned and lived in the house for seven years and their tax basis is $125,000. What is the amount of gain recognized on the sale? OA. S0 OB. $165,000 O C. $100,000 D. $170,000