Why did Augusta, Columbus, Macon, and Milledgeville become early centers of commerce in Georgia?

Answer 1

Why did Augusta, Columbus, Macon, and Milledgeville become early centers of commerce in Georgia?
A)
land was easily obtained in and around these cities
B)
many factories and stores were located in these cities
C)
these cities were both mill towns and cotton trading centers
D)
people could not travel upstream any further than these cities

Answer 2

my choice is C)

Answer 3

I mean my choice is D)

Answer 4

I think you're right.