What role did railroads play in the southern economy? they shipped materials to northern markets. they increased tourist travel to the south. they hurt the growth of cities. they hurt the agricultural economy.

Correct

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.

the answer is 1.. i think