Refer to the table below. According to the Cost-Benefit Principle, how many units of this activity should be carried out?

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Refer to the table below. According to the Cost-Benefit Principle, how many units of this activity should be carried out?

A.4

B.3

C.6

D.1

正确答案：3

Tag：微观经济学中国大学MOOC微观经济学时间：2021-12-11 14:23:43