In the diagram, S1 and S2 represent the supply curves for an agricultural product in years 1 and 2, respectively. D is the demand curve for years 1 and 2. During year 1, the government bought the quantity needed to keep the price at OP. The price remains fixed at OP in year 2. How much extra must the government purchase in year 2 compared with year 1?
- AWZ
- BXY
- CXZ
- DYZ