Answer :
The primary purpose of quotas, passports, and visas to limit the movement of people into a nation.
What is the term Immigration about?
An immigration is defined as the movement of one person or a citizen to another country. It provides the social, economic and cultural advantages to the nation.
There are numerous facilities are available nowadays that is helpful to generate more immigration policies in order to restricted the number of immigrants.
Therefore, correct option is D.
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