ANSWER: TO PREVENT POTENTIAL IMMIGRANTS FROM ENTRY INTO THE UNITED STATES.
EXPLANATION: The United States enacted the Immigration Act of 1924 to limit the number of immigrants allowed entry into the United States. This was established through a national origins quota system, in which immigration visas are only provided to two percent of the total populace of each nationality in the United States.
However, this enactment was targeted towards the Eastern Europe and Africa, with complete exclusion of immigrants from Asia.
Conclusively, this enactment was a legislative expression of the xenophobic attacks towards eastern and southern European immigrants.