Answer:
A)
okra
B) yams
Explanation:
Before Being introduced by the African population, Okra and Yams were not a common crops in American continent. Most of the people in American continent consumed potatoes, wheats, or corn.
The knowledge about Okra and Yams were introduced by either ex-slaves that gained their freedom and managed to became a farmer or traders who sold their products in Africa and obtain a knowledge about these crops during their visit.
The division of powers is between State and National Governments.
It made an agricultural industry in the south possible.
For those owning plantations, it made great wealth possible.
It set up a class system.
Even people with small farms seemed to have been able to afford 1 slave, so the south had economic reasons for engaging in the civil war. There were 69000 farms in the south when the war broke out. Each had at least 1 slave so they were very dependent on that labor.
<span>Johannes Kepler developed the 3 laws of planetary motion and Issac Newton developed the 3 laws of motion so the answer is D.
Hope that helps.</span>