Answer:
B. International Classification of Diseases
Explanation:
The statements describing the southern economy in the antebellum era include 'it was primarily agricultural', 'it relied heavily on slave labor' and 'it produced mostly cotton and tobacco', It was a primary economy.
<h3>The southern economy in the antebellum era</h3>
In the USA, the economy of the antebellum era underwent an acceleration of economic growth.
This economy was characterized by the presence of slaves in the southern states and the family-farm of the free states.
In these southern states, the economy was directly tied to cotton and tobacco production.
Learn more about the antebellum era here:
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