Which of the following describes an effect of the Immigration and Nationality Act of 1965?

This statement is incorrect because the 1965 Act eliminated the national origins quotas that had previously restricted immigration from various regions, including the Middle East. Instead of establishing quotas, the Act aimed to create a more equitable immigration system.

This choice is misleading as the 1965 Act led to increased immigration from Latin America rather than a decline. The removal of quotas allowed for greater immigration flows from various regions, including Latin America, which continued to grow in subsequent decades.

While the 1965 Act did not specifically target Canada and Mexico, it primarily focused on the elimination of national origin quotas. Immigration from these neighboring countries was not significantly limited prior to the Act, so this statement doesn't accurately reflect the Act's impacts.

This statement is incorrect because the 1965 Act actually reduced the proportion of immigrants from Western Europe. The removal of quotas allowed for increased immigration from other regions, particularly Asia and Latin America, which shifted the demographic composition of immigrants to the U.S.