单项选择题
如果一份肯德鸡的边际效用为3，一件金利来衬衫的边际效用为20，当二者的价格分别为15元和150元时，消费者的消费行为应该是（ ）。 A.
增加衬衫或减少肯德鸡的消费 B.
增加肯德鸡或减少衬衫的消费 C.
同时增加或减少二者的消费 D.
对二者的消费量不变
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