How has immigration policy changed over time?

O A. Since 1965, the U.S eliminated quotas based on national origin.
O B. Since 1965, immigration restrictions were lifted.
O C. Since 1800, the U.S prohibited banning immigrants from certain countries.
O D. Since 2000, Congress has tightened citizenship requirements.

A. Since 1965, the U.S eliminated quotas based on national origin.

The correct answer is:

A. Since 1965, the U.S eliminated quotas based on national origin.

Explanation:

Prior to 1965, the United States had a national origins quota system in place, which limited immigration based on nationality. However, in 1965, the Immigration and Nationality Act was passed, and it eliminated the quota system. This act established a new preference system based on family reunification and employment skills, rather than nationality. Since then, immigration restrictions have generally moved away from a focus on country of origin and more towards other factors such as family ties and employment skills.