C. the support of their close knit culturally united neighborhoods
Explanation:
It often happens in the history of immigration in the United States that the families that come build their own culture and net of support by moving closer together to those that are close to them culturally and socially, you often found neighborhoods with people of the same background, from the same country or culture that supported one another.
My guess would be A.<span>It causes the lines to stand out so the reader reflects on their importance. But I'm only 98% sure on that so don't just rely on my answer lol. I still hope it helped a bit! Good Luck! :)</span>
