Which of the following examples serves the same rhetorical purpose as that served by the pack of gum in line 87?
A、the apple in line 104
B、the groundwater in line 93
C、the climate stability in line 95
D、the good feeling in line 114
E、the beautiful sunset in lines 112
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试题解析
这包口香糖指的是清晰的经济交换中的一件商品。第二篇文章第三段的第二句提到的苹果也是类似的一种交换。