Answer:
West
Explanation:
Railroads started in the west because they were the main exporting area and they needed a more efficient way to get there goods from place to place.
Increased international trade greatly improved the standard of living for both Americans and Europeans.
Increase in international trade improved the standard of living for both Americans and Europeans because international trade increases the economy of a country as well as economic condition of citizens. The better of economic condition increases purchasing power of people which results in the standard of living of the people.
]When a country produces more good so it can earn valuable currency by exporting goods so we can conclude that increased international trade improved the standard of living for both Americans and Europeans.
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The answer is C. it allowed people to buy and sell goods in a wider market
