Which statement explains a shortcoming of the bid-rent theory?
a. It assumes that a city exists on a flat, featureless plane with all employment opportunities found in a single central business district
b. It depicts real life applications in the context of increasing land values, but does not consider decreasing values
c. It illustrates social and spatial processes, but does not consider the impact of economic conditions on land use.
d. It includes calculations that consider land value and commercial location with a constant assumed for distance from the central business district
e. It suggests that city transportation varies depending on the type of land use: commercial, industrial, or residential