Due dil·i·gencenoun LAWreasonable steps taken by a person in order to satisfy a legal requirement, especially in buying or selling something.
Egypt because it was where they expanded their country with slaves. Also, that's why they built the pyramids to represent Muslim powers, or it could be Islam because I remember when the Egyptians had ran into them. But I'm pretty sure it's Egypt
The answer is c they learned how to grow food and survive from the american indians