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

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asked Apr 4, 2018 28.3k views

1 vote

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

History
high-school

Dennis Huo asked

by Dennis Huo

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2 Answers

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Answer: the answer is A bridging the rio grande river

Explanation: wherefore the answer is A

Powderham answered Apr 5, 2018

by Powderham

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5 votes

Crossing the Sierra Nevada Mountains would be your answer. Answer: D.

Saggio answered Apr 8, 2018

by Saggio

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