They walked across the bering strait which was the land bridge at the time this is the theory
A, it refers to people, like Californians, who move to the Pacific Northwest for a better quality of life.
I think that it's B, because I know in the late 1800s, sanitation in the city was absolutely atrocious, and that many people died from things like rats carrying diseases, or just bad sanitation. I may be wrong, though.
216/1000= 108/500= 54/250= 27/125 the answer is 27/125
