The congress of racial equality
a) was led by martin luther king jr
b) used boycotts in the 1960s to achieve integration
c) used sit-ins in the 1940s to encourage integration
d) was led by rev ralph abernathy

Which of these is not a criticism of the concentric zone model? it does not accurately describe cities after the rise of suburban development. it only applies to cities that grew after the development of the automobile. it assumes that inner-city areas will always be repurposed instead of abandoned. it places too much importance on the traditional central business district.