Which of the following best describes the relationship between industrialization and immigration to the United States during the 19th century?:  
 Pollution created by industrialization deterred European immigration to the United States.    
 The increase in immigration drove down wages for lower-class industrial laborers.  
   Expanded U.S. industrialization increased demand for highly skilled immigrant labor.   
  Fears of foreign theft of American industrial technology led to strict limits on immigration.