What are 4 reasons immigrants were not admitted into the united states

1. Has already illegally worked in the U.S.

2. Is suspected of staying in the U.S after their green card expires.

3. Presumed of having ties to terrorists or criminal organizations.

4. Having been found guilty of a criminal offense.

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i normally just use

the answer should be a. the sui empire, the tang empire extended from korea in the west to manchuria in the east.