Please choose the correct answer and show the detail calculation of the below figure

55) In the figure above, originally the apartment rental market is in short-run and long-run equilibrium with a rent of $600 per month. Then the government imposes a rent ceiling of $500 per month. The rent ceiling leads to a 557 A) surplus of 1,000 apartments. B) shortage of 2,000 apartments. C) surplus of 2,000 apartments. D) shortage of 1,000 apartments. 2 ( cy part (dollars per month) 700 600 500 400 300 200 100 0 1 2 3 4 5 6 7 8 9 10 11 Quantity (thousands of units per month)