📝 A huge wave of immigration in USA

Q1. Approximately how many immigrants arrived in the United States between 1860 and 1930?

💡 Difficulty: easy | ✅ Correct: C

Q2. If immigration had been reduced by 12 % the total U.S. population in 1930 would have been what fraction of the actual population? Use expression \(0.88 \times \text{actual}\).

💡 Difficulty: medium | ✅ Correct: A

Q3. Economic historian William Ashworth estimated that without immigration the labor force in 1920 would have been 14 % lower. Assuming per‑capita productivity remained constant, what would be the most direct effect on total output?

💡 Difficulty: hard | ✅ Correct: C