Some Governments Legally Recognize Slums Areas of the Urban Poor

Some governments legally recognize slums areas of the urban poor in developing countries.The best argument for this practice is based on the understanding that

A) the people utilize discarded building materials.
B) the people work to improve their living conditions if they know they can stay in an area.
C) the slums usually lack clean water, sewers, electricity and roads.
D) most cities cannot afford to provide these people with basic services.
E) governments bulldozer squatter shacks and drive away illegal settlers.