I want to know the answer to the following question:
What industry is responsible for a large growth in Detroit's population?
All the background I'm provided with is that "The city's population increased more than sixfold during the first half of the 20th century, fed largely by an influx of European, Middle Eastern (Lebanese, Assyrian/Chaldean), and Southern migrants to work in the burgeoning automobile industry.". Is that enough to answer the question?