Answer :
The role that the Railroads played in the Southern Economy was that "They Shipped materials to Northern Markets" Their main goal was to ship crude materials.
Correct answer:
They shipped materials to northern markets.
The market revolution brought about economic growth and new levels of wealth, railroads in the southern economy played an important role in transporting materials to markets in the north, their factories fed the demand for southern cotton cultivated by slaves and such materials They were transported to the northern markets.