Final answer:
Detroit was one of the most popular cities in the 1950s due to its prominence in the automotive industry.
Step-by-step explanation:
In the 1950s, Detroit was one of the most popular cities in the United States due to its prominence in the automotive industry. It was the headquarters of major automobile manufacturers like Ford, General Motors, and Chrysler. The city had the advantages of abundant industrial labor, access to raw materials, and a strong entrepreneurial spirit. Detroit's economic growth and influence in the automotive industry played a significant role in making it one of the most popular cities in the 1950s.