Which group of American people would benefit the most if illegal immigration did not exist in the U.S?

1. elderly U.S citizens
2. high school drop outs
3. big business entrepreneurs
4. people working in the medical field

3. big business entrepreneurs

Big business entrepreneurs would benefit the most if illegal immigration did not exist in the U.S. This is because they often rely on cheap labor provided by undocumented immigrants to keep their costs low and increase their profits. Without the availability of this cheap labor pool, businesses would need to hire legal workers at higher wages, which could result in increased costs for the business owners.