What was the significance of the Immigration and Nationality Act of 1965?
A. It limited the number of immigrants who could enter the United States from each country each year.
B. It established a specific number of immigrants who could enter the United States from northern and western Europe.
C. It barred the entry of immigrants the United States considered to be undesirables or likely to become public charges.
D. It eliminated the quota system and allowed as many as 270,000 immigrants to enter the United States each year.