The correct answer is B) most of the people in the neighborhood came from the same country.
The statement that describes the ethnic neighborhoods that were created by immigrants who settled big American cities in the late 1800s is "most of the people in the neighborhood came from the same country."
Indeed, the name of these neighborhoods was "ethnic enclave", because most of the people that lived there had the same nationality, which means they were born in the same country. So in those places, you could find these people speaking their native language, living their own traditions, and respecting their own culture.
The other options of the question were a) most of the people in the neighborhood worked in the same company, c) most of the people in the neighborhood spoke English, and d) most of the people in the neighborhood had a small farm.
