What Major Change in Immigration Occurred Beginning in the 1970s

What major change in immigration occurred beginning in the 1970s?

A) The shift toward non-European sources of immigration increased.
B) Immigration became more evenly spread between rural and urban areas.
C) The shift towards European sources of immigration increased.
D) "Direct-route" legislation was removed from the Immigration Act.
E) Education and skills training became new pillars of temporary residency.