which sentence from the story best illustrates the idea that jimmis grandparents live in a part of the country that had not yet been fully settled?

There was nothing but land: not a country at all, but the material out of which countries were made. I had the feeling that the world was left behind, that we had got over the edge of it, and were outside man's jurisdiction. I had never before looked up at the sky when there was not a familiar mountain ridge against it. But this was the complete dome of heaven, all there was of it …. Between that earth and that sky I felt erased, blotted out. Ch 1