An individual contributes two properties to a corporation in a 351 exchange. The first property has a basis of $50000, and fair market value of $70000. The second property has a basis of $80000, and fair market value of $85000. The second property is subject to a mortgage of $40000. The individual's stock basis after the transfer is: A.130,000 B.120,000 C.155,000 D.90,000