问题如下图：
选项：
A. 
B. 
C. 
解答案没有看懂，为什么多卖出一件产品，边际收益为总收入的盈余
NO.PZ2016010801000019问题如下Whiof the following cbest scrimarginrevenue?A.Marginrevenue is the increment to totrevenue if one more unit of prois solB.Marginrevenue is the increment to average revenue if one more unit of prois solC.Marginrevenue is the smallest aition to revenue if one more unit of prois solA is correct.Marginrevenue is the increase in totrevenue from selling one more unit of proct.考点边际成本解析边际成本是指，多生产一单位的商品，所带来的总收入的增加（改变）。c的意思难道不是极限吗，为什么c不对，我感觉a和c是一个意思啊
NO.PZ2016010801000019 Marginrevenue is the increment to average revenue if one more unit of prois sol Marginrevenue is the smallest aition to revenue if one more unit of prois sol A is correct. Marginrevenue is the increase in totrevenue from selling one more unit of proct. 考点边际成本 解析边际成本是指，多生产一单位的商品，所带来的总收入的增加（改变）。 marginrevenue不是边际收入吗？答案解析怎么成了边际成本了？
NO.PZ2016010801000019 Marginrevenue is the increment to average revenue if one more unit of prois sol Marginrevenue is the smallest aition to revenue if one more unit of prois sol A is correct. Marginrevenue is the increase in totrevenue from selling one more unit of proct. 考点边际成本 解析边际成本是指，多生产一单位的商品，所带来的总收入的增加（改变）。边际成本和边际收益是一回事吗？
