Which factor was the greatest advantagr of the united states in world war ii

One major advantage that they had was their industry.  The United was a very industrialized country.  Even when the Japanese bombed at Pearl Harbor, the U.S. was not hindered by the assault and quickly joined the war.  It could mass produce a large number of weapons and equipment for its soldiers and allies. 

One major effect of industrialization on American society was more people moved to urban areas (Point  D).

Further explanation

American industrialization starts around the 1800s. Industrialization means changing the industry from manual labors to machine base industry - to increase productivity and maximize profit.

Industrialization occurred because of innovation, technology and transportation development. Industrialization offered new jobs resulted in urbanization. Many people moved from the farm or countryside to urban areas in search of employment or to live near the factories.  

Industrial Revolution brought significant social changes in the United States. Most of the new industrial company built near to the urban area resulted the city grew faster than ever before. Chicago was the fastest growing city. This growing city faced a new social problem, the increased inequality of wealth was most visible, the gap between the high with the lower-income become wider. The revolution also caused a rise of unskilled workers, poor working condition, low wages, and child labor.  

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Textile industry

Manufacture industry that employs more workers

American industrial revolutions

Keywords: Industrialization in America, a major effect of industrialization, urban area, rural area, American industrial revolution, urbanization