单选题The exchange with the store clerk (line 86) is used to represent ______.Aan example of recyclingBan illustration of the value of human emotionsCa poorly understood and uncommon phenomenonDa particular difficulty in economic analysisEa transaction that is easily accounted for
单选题
The exchange with the store clerk (line 86) is used to represent ______.
A
an example of recycling
B
an illustration of the value of human emotions
C
a poorly understood and uncommon phenomenon
D
a particular difficulty in economic analysis
E
a transaction that is easily accounted for
参考解析
解析：
文中提到的这种交换指的是很容易解释的交易行为。
文中提到的这种交换指的是很容易解释的交易行为。
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