A Taxpayer Purchased Land in 2012 for $26,000 and Sold

A taxpayer purchased land in 2012 for $26,000 and sold it in 2014 for $31,000 cash.The buyer also assumed the remaining mortgage of $13,000.What is the amount recognized on the sale of the land?

A) $5,000 gain.
B) $8,000 loss.
C) $8,000 gain.
D) $18,000 gain.