Which of these played the biggest role in the creation of georgia towns and cities in the 1820s-1850s? a) the cotton gin b) the planning of suburbs c) the building of new ports d) the construction of railroad lines

I believe the answer is: D)the construction of railroad lines

The construction of railroad lines provided a huge number of job opportunities which make many migrants come to this territory.

Along with the increasing number of people, the number of target market for other type of business such as bar , restaurants, hotels are also increased.

Over the time, Georgia town and cities were established.