a.
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History, 23.08.2019 10:20 laiba012305
Which describes a major challenge facing the builders of the transcontinental railroad?
a.
bridging the rio grande river
b.
spanning the grand canyon
c.
tunneling under lake erie
d.
crossing the sierra nevada mountains
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Which describes a major challenge facing the builders of the transcontinental railroad?
a.
a.
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