I believe it is option C
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Inheritance, trade, sold slaves.
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<span>A)availability of railroads to transport crops
</span>Availability of railroads to transport crops <span>was not a factor in making cotton a risky crop to grow, even if such availability makes easier to gain from the crops, the cotton was a risky crop because it is very delicate and environmental factors such as drought or insect infestation could easily kill the plant, making the investment worthless.</span>
Divides the powers into Branches - Separation of powers
Divides the power between central and state govern. - Federalism
Each Branch of govern. - Checks and Balances