Final answer:
The correct document that immigrants must provide for primary identification is a Green Card, as it indicates that the holder is a permanent resident with the right to work in the U.S. legally.
Step-by-step explanation:
Immigrants must provide one of which possible documents for primary identification? The correct answer is b) Green Card. A Green Card is a legal document that shows a permanent resident has the right to live and work legally in the U.S. The Immigration Reform and Control Act of 1986 prohibits hiring of illegal immigrants, requires employers to ask for proof of citizenship, and protects the rights of legal immigrants. This legislation was a response to a surge in undocumented immigration and required employers to verify the identity of their employees and confirm their eligibility to work in the U.S.