How did immigrants impact industrialization

In the late 19th century, immigrants came to the United States in droves. The absolute number of immigrants in the country rose from less than 2.5 million in 1850 to more than 13.5 million in 1910. That boosted immigrants as a share of the population to 15%, from 10%, over the period.

the answer is c     : )

explanation:

i don't have an explanation because i don't know, but i think the answer is c because i googled it and google is right : ) just kidding google isn't allways right but the answer is still c. i hope this !

what are the answers