Consider this scenario: an immigrant family is denied entry into the U.S. based solely on their country of origin, while other families are allowed entry because the U.S. has no restrictions on immigration from some countries. This was common in the U.S. until the Immigration and Nationality Act of 1965 did what?
doubled the size of the border patrol
established an amnesty program for undocumented immigrants
eliminated the quota system
streamlined the deportation process