Xavier and Santos formed a 50/50 partnership. Xavier provided equipment which had a fair market value of $240,000, adjusted basis $105,000, and a nonrecourse financing note with a balance of $60,000. Santos contributed $5,000 cash and a building with a fair market value of $175,000 and adjusted basis of $50,000. After these transactions, Santos at-risk basis in the partnership is:

a. $50,000.

b. $60,000.

c. $80,000.

d. $85,000.

e. $100,000