In recent years, with the rise of large-scale wild zoos, it has been suggested that traditional urban zoos no longer need to exist. However, traditional urban zoos have the advantages of low fares and convenient transportation. Educational function, so traditional urban mobilization is indispensable. Which of the following is not a flaw in the above argument? ['Ignore the possibility of coexistence of safari and traditional urban zoos.', 'Traditional urban zoos with strong educational functions should be retained by default.', 'Ignoring low fares, convenient transportation is not equivalent to facilitating visits by primary and secondary school students.', 'By default, the zoos that are convenient for primary and secondary schools to visit have a strong educational function.']