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问答题
Refer to the table below. The marginal benefit of the 5th unit of activity is:
答案：
A.$10
B.$5
C.$50
D.$44
正确答案：$10
B.$5
C.$50
D.$44
正确答案：$10
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问答题
Refer to the table below. The average benefit of 2 units of activity is:
答案：
A.$20
B.$40
C.$60
D.$80
正确答案：$80
B.$40
C.$60
D.$80
正确答案：$80
