Which transportation breakthrough had the GREATEST impact on American industrialization between 1800 and 1850?
Responses

A construction of factories and millsconstruction of factories and mills

B construction of the transcontinental railroadconstruction of the transcontinental railroad

C construction of canals and the development of the steamboatconstruction of canals and the development of the steamboat

D construction of the highway system and the development of the automobile