【单选题】The passage implies that the full impact of the railroads might be easily seen in__________.
A.the 1860's.
B.the 1870's
C.the 1880's.
D.the 1890's
【单选题】The passage implies that the full impact of the railroads might be easily seen in__________.
A.the 1860's.
B.the 1870's
C.the 1880's.
D.the 1890's
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