Why did the Fall Line become even more important to Georgians as the state industrialized?

A.
The area surrounding the Fall Line contained enough natural gas to power factories throughout the state.
B.
The rivers found along the Fall Line were the only shipping routes to Tennessee and South Carolina.
C.
The area surrounding the Fall Line was home to the first large manufacturing facilities in the state.
D.
The waterfalls found along the Fall Line provided a source of hydropower for the cities established along it.

D. The waterfalls found along the Fall Line provided a source of hydropower for the cities established along it