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.

the first one is d and the second a