Question

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Answer 1

The right answer is:  

South Carolina had an abundance of phosphate deposits and became a world leader in the industry: other areas of the country had other mineral resources, which they developed.  

Explanation:  

Phosphate mining in the US begins in 1868 in coastal South Carolina in a large-scale. Access to river transport and proximity to a port, Charleston, encouraged exports, South Carolina was producing half the world's phosphate by 1885.

Answer 2

South Carolina had an abundance of phosphate deposits and became a world leader in the industry: other areas of the country had other mineral resources, which they developed.