有能可以告訴我冰楓題目的答案?
求解A decrease in the supply1.raises its equilibrium price and decreases its equilibrium quantity.
2.decreases both its equilibrium price and its equilibrium quantity.
3.increases both its equilibrium price and its equilibrium quantity.
4.lowers its equilibrium price and increases its equilibrium quantity.
raises its equilibrium price and decreases its equilibrium quantity.
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