The correct answer is D) Cotton production was spread across most states in the South.
The map shows the production of cotton after the invention of the cotton gin. Based on the map, the true statement is "Cotton production was spread across most states in the South."
In the map, we can see how the production of cotton was abundant in southern states such as Louisiana, Mississipi, Alabama, Georgia, and South Carolina. By the 1850s, cotton production grew to the invention of the cotton gin that helped to produce more cotton, although many slaves were still needed to operate it and to grow the kind of production needed for internal consumption and to export.