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【单选题】
假定X、Y两种商品的价格分别为 、 ,当 时,消费者为获得效用最大化,应A.
增加X商品的购买,减少Y商品的购买
B.
减少X商品的购买,增加Y商品的购买
C.
同时增加X,Y商品的购买
D.
同时减少X,Y商品的购买
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A.
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