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【单选题】
某消费者逐渐增加某种商品的消费量,直至达到效用最大化,在这个过程中该商品的A.
总效用和边际效用不断增加
B.
总效用不断下降，边际效用不断增加。
C.
总效用不断增加，边际效用不断下降。
D.
以上都有可能
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