please answer

Lebron and Candace Parker, a man'ied couple, sell their personal residence to Giannis. Giannis pays $350,000 and assumes their $100,000 mortgage. To make the sale, the Parkers pa}r $22,500 in commissions and $1,500 in legal costs. The couple has owned and lived in the house for ten years and their tax basis is $250,000. What is the amount of gain recognized on the sale? A) $0 B) $20,000 C) $20,000 D) $520,000