Sue and Andrew form SA general partnership. Each person receives an equal interest in the newly created partnership. Sue contributes $19,000 of cash and land with a FMV of $64,000. Her basis in the land is $29,000. Andrew contributes equipment with a FMV of $21,000 and a building with a FMV of $42,000. His basis in the equipment is $17,000, and his basis in the building is $29,000. How much gain must the SA general partnership recognize on the transfer of these assets from Sue and Andrew?

A. $0
B. $4,000
C. $48,000
D. $52,000