Answer:B. attracted thousands of settlers in the 1820s and 1830s with its low land prices and suitability for cotton production.
Explanation:The "old southwest" is an Eighteenth century term used to informally describe the territory of the United States of America which eventually formed the states of Missouri, Mississippi, Arkansas, Alabama, Louisiana, Texas, and parts of Tennessee, Kentucky, and Florida.
During the early Eighteenth century, the "old southwest" of the United States of America attracted migrants especially due to favourable climatic conditions of the region which favoured Commodity Agriculture.
