In 1947, who subpoenaed 43 witnesses from the hollywood film industry to give testimony on whether communists influenced the american film industry?
a. alger hiss
b. house un-american activities committee (huac)
c. julius rosenberg
d. ethel rosenberg

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.