4. What 3 countries saw the most immigration to the US in 1907?

Russia, Italy and Austria

Explanation:

More than 19 percent came from Russia, almost 16 percent from Italy, and more than 15 percent from Austria. Mexico and Canada were the only non-European countries in the top 10 countries of birth for immigrants arriving in 1907.

Russia,italy,Austria

Explanation:

in 1907 immigrants from Russia accounted for 19 percent of u.s immigration more than any other country next after Russia where italy and Austria which accounted for 15 percent each.