Which of the following statements is not true? a) food taboos usually derive from unique characteristics in the physical environment. b) hotels, fast-food restaurants, and other franchises encourage a uniform appearance on the landscape to promote customer recognition. c) bostans, small gardens distributed throughout istanbul, turkey, have been supplying the city with fresh vegetables for centuries by practicing intensive agriculture. d)two social groups living in close proximity will retain unique social customs if there is limited interaction between them. e)leaders of many developing countries fear that the spread of u. s. popular culture will destroy traditional social behavior.