Answer:
E :Superfund
It was created to clean up polluted areas
The barons provided king John with money and men for the territory
"They were all cash crops" is the option that tobacco, cotton, and rice have in common because they were mainly exported. They were grown in the South.
One of the main ways in which migration patterns can affect other migrations is that when one large group of people moves to another area, this limits the amount of available resources in the area, and often forces the people who were there first to seek new land--thus forcing those new people off their land as well, in something of a never-ending cycle.
I think it's brainstorming