Respuesta :

Answer: RAILROADS

Explanation: The main reason why chines immigration from china is because of economic hardships there because britain were dominating china during the opium war. Because of this, chines immigrated to USA to work to be able to send money back to their families left at home.  

grande03
Railroads is the correct answer.
Chinese immigrants in the 19th century worked as laborers, particularly on transcontinental railroads such as the Central Pacific Railroad