Which of the following best describes why research on the relationship between highways and suburbanization examined the original 05. highway plan rather than modern highways? I. b. The original highway plan connected cities to suburbs in a way that allowed faster commuting for ofce workers, making it ideal to study this relationship. The original highway plan replaced outdated modes of transportation like trains and streetcars, making further expansion of the suburbs possible. The original highway plan did not include connecting highways that circumvented urban areas. so it was ideal to examine connection between formerly rural areas and the urban core. The original highway plan was based on military needs. not to connect cities and suburbs. so it snakes a good natural experiment to study. None of the above