Answer;
C. a common language.
In the 1800s, an important motivation for both "old" and "new" immigrants to settle in ethnic neighborhoods was a common language.
Explanation;
The old immigrants came from the northern or western Europe while the new immigrants came from southern or eastern Europe.
Old immigrants were protestant while the new immigrants were Catholic , Orthodox or Jewish.
A lasting impact of European colonialism was the creation of artificial boundaries created by colonial rulers brought together and separated people arbitrarily. For example, if you look at the boundaries of the nations in Africa, you will notice that cultural groups were divided and combined within and by lines created by European powers.
Smith argued that by giving everyone freedom to produce and exchange goods as they pleased (free trade) and opening the markets up to domestic and foreign competition, people's natural self-interest would promote greater prosperity than with stringent government regulations.
Answer: The post-WWII period was one of peace and prosperity. Americans used the money they had saved during World War II to buy consumer goods that were not available during the conflict. With the subsequent boom in the economy, thousands of people found employment in the United States. Americans were making more money and the nation had the highest standard of living in the world.
Archimedies discovered water displacement when he took a bath to help the king of egypt to see if his crown has real gold when he took a dip the water flowed over the top and he discovered water displacement