The development of Georgia's railroad system and the introduction of the cotton gin were similar in that

A

each led to an decrease in the importation of slaves after 1808.

B

each was an effect of increased industrialization in the "Deep South."

C

each was a major cause of the sectional conflict that resulted in Georgia's secession in 1861.

D

each was a major factor in the economic prosperity that characterized the antebellum period in Georgia's history.