What played the biggest role in the creation of georgia towns and cities in the 1820s through 1850s

The answer is: D) the construction of railroad line

The railroad were integral to the growth of Georgia in 1820-1850s? in several way.

First of all, it allowed people to move easily, safely, and affordable travel, the construction of railroad line contributed and provided a large jobs opportunities, many foreigner migrated to create and seek for green pasture.construction of the railroad help to integrate different region of the nation economically.The construction help increase in labour power and promoted the basic market to increase in demand.The Georgia  is know for the diverse architecture and cobblestone streets of its old town.

by 1880, germany had more rail lines than great britain and russia.

im going to go with b.