Which transportation system had the greatest impact on the united states in the period before the civil war?

railroads

canals

turnpikes

clipper ships

It would actually be B. canals  

Explanation:

Railroads were implemented a lot more after and during the Civil War period with the transcontinental railroad being finished in 1869. The period before the war was impacted more by steamboats and canals.

establish villages

explanation:

what are two things that greatly the american economy after the war? the huge buildup of u.s. military the beginning of the korean conflict the creation of the gi bill the marshall plan for nations