The fourth one is correct
the answer is they are headed by one person
Answer:
By the passage of the National Origins Act of 1924
Explanation:
The United States government changed immigration restrictions during the !920s by the passage of the National Origins Acts in 1924 which introduced an immigration quota system of 2% of each nationality represented in the 1890 census.
You might want to make research on that in the urban graph network. It shows you everything.
The answer is a steamboat. :)
