选择题:商品的价格不变而消费者的收入增加,预算线( )

题目内容:
商品的价格不变而消费者的收入增加,预算线( )

选择一项:
A. 不动
B. 向左下方平行移动
C. 绕着一点移动
D. 向右上方平行移动
参考答案:

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