Geographers C.D.Harris and E.L.Ullman developed the ________ model in 1945.
A) concentric model
B) sector model
C) multiple nuclei model
D) adaptive concentric model
E) successive hierarchy model

Question

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Geographers C.D. Harris and E.L. Ullman developed the multiple nuclei model in 1945, which suggests that a city is a complex structure made up of many centers of activity, not just one central business district. This model takes into account the fact that cities can have more than one center of economic activity, such as industrial and commercial areas, and that these centers may be located at different points throughout the city. The multiple nuclei model is considered an improvement over earlier models, such as the concentric and sector models, which did not account for the complexity of urban areas.