Question

Which of these helped to make the economic divisions between upcountry and lowcountry regions less dramatic in the early-1800s?

Answer 1

There are no options given, but historically speaking it was the invention of "Cotton Gin".

A cotton gin was a revolutionary invention which enabled people to easily separate cotton fibers and seeds; previously it used to take a large time sorting it manually. The inventor behind this was Eli Whitney. The processing was made easy but still slaves were needed to grow cotton.