Please!... Read the sentences from "The Workers of Ellis Island."

Throughout the years, numerous organizations offered aid to immigrants at Ellis Island. Many of these immigrant aid societies maintained permanent representatives on Ellis Island.
What can a reader determine from details in the sentences?
A. Ellis Island welcomed many new immigrants to the United States.
B. Many immigrants had no one but immigrant aid workers to help them.
C. Immigrant aid workers and immigrants lived together on Ellis Island.
D. Some immigrants did not leave Ellis Island for many years.