Despite Residential Segregation, the Problems of the Urban Poor at the End

Despite residential segregation, the problems of the urban poor at the end of the nineteenth century became the concern of the middle and upper classes because

A) they paid high taxes to support government welfare programs.
B) epidemics that began in slums usually spread to more affluent neighborhoods.
C) slum dwellers received a disproportionate share of city services and infrastructure.
D) they felt responsible for assimilating immigrants into American society.