Though the capital would move again in 1807, the movement of the capital of Georgia from Augusta to Louisville was representative of which development? A the establishment of the Chattahoochee River as the major trade route for the state B the gradual shift of the state's population center from coastal areas to the northwestern region C the transition from a focus on self-sufficient agriculture to the development of a plantation economy D the constant threat posed by American Indian tribes in the southern and eastern regions of the state