In the illustrative case of Rome, Italy, in the 1920s and 1930s, suburbs were intentionally created ex novo in order to give lower classes a destination, in consideration of the actual and foreseen massive arrival of poor people from other areas of the country.
so railways
Answer: B
Explanation:
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It was faster and cost less. It made the population grow and it caused modernization. But it also had environmental hazards and it was sometimes dangerous.