What led to the major influx of immigrants within cities?

• A. The Second Industrial Revolution
• B. The Great Depression
• C. The invention of the printing press
• D. The space race

Answer: (A)

Industrial growth in urban centers during the Second Industrial Revolution created a massive demand for factory labor. This meant more jobs in cities, attracting people from abroad who were seeking wages and new opportunities. Immigrants arrived in large numbers to work in manufacturing, railroads, and related industries, and they clustered in urban neighborhoods where networks and help from fellow migrants could assist their settlement. This combination of abundant urban jobs and established immigrant communities explains the major influx of immigrants within cities during that era. The other options don’t fit: the Great Depression came later and reduced immigration; the printing press is centuries old and not tied to modern urban migration; the space race involves science programs and not broad labor migration.