Which statement best explains why US cities became segregated by culture and ethnicity in the late 1800s and early 1900s?

Immigrants to the nation during this period started forming communities containing people of shared cultures and ethnicities. This allowed them to be able to be with people of a shared background, easing the transition into a new country and culture. The separation of persons of different backgrounds led to small "towns" springing up within larger urban centers during the late 19th century.

For edgenuity the answer is option a