Which conditions made building the railroad difficult? Check all of the boxes that apply.

What physical features and climates made building the transcontinental railroad difficult? Building the transcontinental railroad was difficult because tracks were laid across 1,700 miles of rugged plains in hot and cold conditions. He led the Seventh Calvary.

Explanation:

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Harsh weather, little access to supplies, and drilling tunnels through rock

Explanation:

The answers are Harsh weather, little access to supplies, and drilling tunnels through rock

what are the choices?

the communist manifesto is an 1848 political pamphlet by the german near the end of the manifesto, the authors call for a "forcible overthrow of all existing social conditions",  ..