Which of the Following Claims Would a Proponent of IRCA

Which of the following claims would a proponent of IRCA, who relies on nativism and anti-immigrant sentiment, use to garner support for placing tighter regulations on immigration?

A) that immigrants were over-using the welfare system
B) that the newcomers were too different and "unassimilable"
C) that immigrants were stealing jobs from Americans
D) All of the above