As of 1900, list the top 5 countries from which immigrants came to the US.

Answer: Italy, Poland, and Russia, Many were pulled here by contract labor agreements offered by recruiting agents, known as padrones to Italian and Greek laborers. Hungarians, Poles, Slovaks, Bohemians, and Italians flocked to the coal mines or steel mills, Greeks preferred the textile mills, Russian and Polish Jews worked the needle trades or pushcart markets of New York.

Explanation:

mostly people from southern and Eastern Europe.