What immigrants retain the culture of their native lands? passing through immigrant processing stations working alongside americans joining nativist organizations living in close proximity to others from their country

The correct answer is D) living in close proximity to others from their country.

The element that helped immigrants retain the culture of their native lands was they lived in close proximity to others from their country.

For immigrants, it was very important to still follow his traditions and respect their beliefs of their former countries. One way to do it was by living in close proximity to others from their country so the culture and traditions could be maintained, starting with the language. They even supported each other when difficulties arose.  

it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.