Final answer:
After wars like the Civil War and World War II, New York City commonly experienced a rise in population, economic prosperity, and infrastructural improvements. This pattern is part of a broader historical context where wars tend to lead to periods of rebuilding and growth in major cities.
Step-by-step explanation:
After a war, cities can undergo significant changes in population, economy, and infrastructure. Referring to New York City's growth following the Civil War and continuing through the start of World War I, we saw the population quadruple, with the city becoming a bustling hub that fueled economic growth and industrialization. This trend was a part of the Second Industrial Revolution, with cities transitioning from commerce and trade centers to industrial powerhouses, featuring skyscrapers, smokestacks, and elevated railroads that dramatically improved the infrastructure.
While the Cold War era saw a significant impact on the domestic life in America, it was also a period of economic prosperity. Particularly after World War II, change was evident through the GI Bill of Rights, which not only assisted veterans in transitioning back into civilian life but also contributed substantially to the growth of the American middle class. New York City, and indeed most American cities, experienced transformations as a result of this post-war period, with a move toward suburban lifestyles and a focus on social developments beyond just economic prosperity.
The given choices for how New York has changed three years after the war are too vague to address directly, as the question does not specify which war is being referred to. However, if we consider the trends following significant wars such as the Civil War and World War II, the most consistent patterns for New York City are an increase in population, economic growth, and improved buildings and infrastructure. Thus, options B and C are the most likely scenarios based on historical data.