The answer is "D. to accommodate growing populations."
Because the location of the slave trade centers in the south the slaves were able to provide the labor to produce cotton.
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Answer: It's be. The U.S found out the soviets were placing missiles in Cuba. They did that because they found out the U.S place missiles near them. can't remember the exact location. In the end the U.S block Cuba from the soviets and there was this standoff before both agreed to remove their missiles.
Explanation: