D. When the United States acquires a new territory
If you need an explanation then I will tell you one if you want.
I hope this helps! ^^
Agriculture turned the course of history because it allowed previously nomadic tribes to settle down in one place for an extended period of time.
At the College of William and Mary in Williamsburg, colonial Virginia's capital, he studied mathematics, natural philosophy (science), and political philosophy with Scottish scholar William Small.
Less digging between one body of water and another, so less digging