单选题What can the postal service do?AColleting market prices of goods.BSpreading ideas at a low cost.CPromoting political lobbying.DAll of the above.
单选题
What can the postal service do?
A
Colleting market prices of goods.
B
Spreading ideas at a low cost.
C
Promoting political lobbying.
D
All of the above.
参考解析
解析：
第六段第二句提到“Merchants in America’s eastern cities used it to gather information…”，对应选项A的内容。根据该段第三句提及的“In the American debate about slavery, it offered abolitionists a low-cost way to spread their views, just as later technologies have cut the cost and widened the scope of political lobbying”，可知选项B（低成本传播思想）和选项C（促进政治游说）都与原文相符。
第六段第二句提到“Merchants in America’s eastern cities used it to gather information…”，对应选项A的内容。根据该段第三句提及的“In the American debate about slavery, it offered abolitionists a low-cost way to spread their views, just as later technologies have cut the cost and widened the scope of political lobbying”，可知选项B（低成本传播思想）和选项C（促进政治游说）都与原文相符。
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