Answer: Scandinavia, Italy, Poland, and Russia.
Explanation:
Unlike earlier immigrants, the second wave brought people mostly from non-English speaking southern and eastern Europe countries. The principal source of immigrants was Scandinavia, Italy, Poland, and Russia. Also, Austria-Hungary, Bulgaria, Greece, Portugal, Rumania, Spain, and Turkey. Coming from very different cultures, with other languages, made new immigrants struggle to adapt to life in the US.