What Is One Way in Which Urban Areas in Developing

What is one way in which urban areas in developing nations differ from urban areas in highly developed nations?

A) Since private automobile ownership rates are lower in developing nations, urban areas there have better air quality than urban areas in highly developed nations where automobile ownership rates are much higher.
B) Urban areas in developing nations are currently growing at a very rapid rate such that the pace of growth has outstripped the limited capacity of cities to provide basic services, whereas in the highly developed nations urban growth that occurred over that last 150 years or so occurred slowly enough to allow important city services such as sewage treatment and housing to keep pace with the influx of people from rural areas.
C) Urban areas in developing nations tend to have more females than males, whereas more males than females live in urban areas in highly developed nations.
D) Brownfield development is a unique phenomenon in the urban areas of developing nations due to the slums and squatter settlements found there, but since there are no slums in the urban areas of highly developed nations, there are also no brownfields.