The preference given to family members of immigrants residing in the united states
created

Migration chains

Explanation:

Migration chains refers to a situation when immigrants from another country migrated toward the same location with their friends or relative who already immigrated before them.

Often times, immigrants who find comfort in another country will influence family members from their original country to come and stay with them. This will give newer immigrants a sense of belonging compared to moving to another country without knowing any body.

#2 the answer is d

#3 the answer is a

#4 the answer is b

if i am correct the answer is going to be a) the federal program of reconstruction ended.