Which describes a major challenge facing the builders of the transcontinental railroad?

A.
spanning the Grand Canyon

B.
tunneling under Lake Erie

C.
bridging the Rio Grande River

D.
crossing the Sierra Nevada mountains

Question

Which describes a major challenge facing the builders of the transcontinental railroad?

A.
	spanning the Grand Canyon

B.
	tunneling under Lake Erie

C.
	bridging the Rio Grande River

D.
	crossing the Sierra Nevada mountains

warriorz13 · Answer

I can't remember ATM

wwhitlock · Answer

There was no need to go under Lake Erie. The Rio Grande and Grand Canyon were far to the south of the route.