<span>Nearly all colonies and, later, states in the United States were settled by migration from another colony or state, as foreign immigration usually only played a minor role after the initial settlements were started. Many new immigrants did end up on the frontiers as that was where the land was usually the cheapest.
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A. Transcontinental railroad
The correct answer is It gained land from Germany in the west.
The Eastern parts were annexed by the Soviet Union and Poland was assigned noticeably smaller territories to the west including the prewar Free City of Danzig and the former territory of Nazi Germany east of the Oder-Neisse line and German Silesia. Germans were expelled from these Recovered Territories
