Which of the following shows the correct relationship?
A. Agglomerations are composed of suburbs, exurbs, and satellite cities.
B. Metropolitan areas are composed of conurbs, central cities, and suburbs.
C. Central cities are composed of towns, cities, and urban areas.
D. Central cities are composed of metropolitan areas, suburbs, exurbs, and satellite cities.
E. Metropolitan areas are composed of central cities, suburbs, exurbs, and satellite cities.