Suppose we observe that the equilibrium quantity of a particular good has increased significantly over the past 5 years, with virtually no change in the equilibrium price. The most likely explanation is that, over the past 5 years:
1.supply has decreased but demand has increased.
2.both supply and demand have increased.
3.both supply and demand have decreased.
4.supply has increased but demand has decreased.
2. both supply and demand have increased.
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