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100 POINTS PLEASE HELP ASAP!!!! The most difficult part of laying the tracks for the transcontinental rail line probably was A. crossing the Rocky Mountains and Sierra Nevada B. crossing the Great Plains.
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100 POINTS PLEASE HELP ASAP!!!!

The most difficult part of laying the tracks for the transcontinental rail line probably was

A. crossing the Rocky Mountains and Sierra Nevada

B. crossing the Great Plains.

C. crossing the Appalachian Mountains.

D. crossing the Ohio and Mississippi rivers.

User Dyvel
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1 Answer

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Answer:

crossing the Rocky Mountains and Sierra Nevada

User Szegheo
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