Answer:
If we go down the write up, we notice zero tolerance for the use and allowance of immigrants through immigration from 1920 to 2012
Step-by-step explanation:
The Immigration Act of 1924 created a quota system that restricted entry to 2 percent of the total number of people of each nationality in America as of the 1890 national census–a system that favored immigrants from Western Europe–and prohibited immigrants from Asia.
The Immigration Reform and Control Act altered U.S. immigration law, making it illegal to knowingly hire illegal immigrants and establishing financial and other penalties for companies that employed illegal immigrants.
In June, 2012,the administration issued new policy on Deferred Action for Childhood Arrivals to allow young unauthorized immigrants to remain in the country temporarily. They can also apply for work authorization.