On July 1, of the Current Year, Robert Forms the Yew

On July 1, of the current year, Robert forms the Yew Corporation.In exchange for 100 percent of the corporation's stock, Robert contributes land with a fair market value of $100,000.Robert acquired the land 5 years ago at a cost of $30,000.At the date of the contribution, the land is subject to a $10,000 mortgage which the corporation assumes.What is the basis of the land to Yew Corporation?

A) $20,000
B) $30,000
C) $90,000
D) $100,000
E) None of the above