Discuss the long-term urban demographic impact of immigration and internal migration from rural areas to cities during the late 19th and early 20th centuries.

• A. It had little effect
• B. It caused urban decline
• C. Mass migrations created diverse, dense urban populations driving economic growth, reshaping neighborhoods, politics, and culture and laying the groundwork for modern American cities
• D. It led to the elimination of city neighborhoods

Answer: (C)