The establishment and rapid growth of permanent settlements trends that started in early civilizations became stronger in classical civilizations.
Actually, it is letter A...the first choice.
If we are talking metaphorically its D if we are talking about the trenches of war B
Settlers went to Oregon in the 1800's to participate in the fur trade. Settlers also wanted to claim land and settle in the Willamette Valley. The Willamette Valley has fertile soil that is good for growing and sustaining crops. The temperature in Oregon is also mild all year long.
Its D..hope this helps good luci