单选题:通常情况下,生产者通过提高某产品单位销售价格而增加其销售总收入的前提条件是该产品的(  )。

题目内容:
通常情况下,生产者通过提高某产品单位销售价格而增加其销售总收入的前提条件是该产品的(  )。 A.需求价格弹性系数小于1
B.需求收入弹性系数大于1
C.需求收入弹性系数小于1
D.需求价格弹性系数大于1

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