37. Aldo owns a warehouse used in his business which has an adjusted basis of $240,000 and is subject to a mortgage with an $80,000 principal balance. Aldo exchanges the warehouse for land worth $320,000. In addition, he receives cash of $40,000, and the other party will assume the mortgage. What is Aldo's realized gain? A) $120,000 B) $80,000 C) $200,000 D) S190,000