The correct answer is immigrant groups.
Addams followed the example of Tonynbee Hall, which was described as “a community of university men “.
In the 19th century women’s movement started to promote education and autonomy to women in order to break the male domination. So the Hull house was known as " a community of university women".
Hull house was located in a poor neighborhood with working class people ( many of them recent European immigrants). The volunteers , which were called residents at the Hull house, held classes in literature, history, art, domestic activities and other subjects. Hull House also held concerts that were free to everyone, offered free lectures on current issues, and operated clubs for both children and adults.