Which Statement Concerning the Central Business District (CBD)is Not Correct

Which statement concerning the central business district (CBD) is not correct?

A) The core of a CBD rarely exceeds a square mile.
B) A CBD is typically located in the part of a city or town with the greatest concentration of office buildings and retail stores.
C) Over the past 40 years, the share of the CBD relative to the planned shopping center has increased.
D) A CBD has at least one major department store and a broad grouping of specialty and convenience stores.