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 Mexican-American War, waged between the United States and Mexico from 1846 to 1848, helped to fulfill America's "manifest destiny" to expand its territory across the entire North American continent.
3,000 to 4,000 of them died from disease.
Hope its helpful !
C. When he defeated king Darius 3rd of persia