Sue and Andrew form SA general partnership. Each person receives an equal interest in the newly created partnership. Sue contributes $10,000 of cash and land with a FMV of $55,000. Her basis in the land is $20,000. Andrew contributes equipment with a FMV of $12,000 and a building with a FMV of $33,000. His basis in the equipment is $8,000, and his basis in the building is $20,000. 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