By transporting commuters without crowding city streets is the way elevated trains and subways improve urban transportation. Hence, option C is correct.
What is urban transportation?
Urban transportation consist of much transportation like buses, trains, subways, metro train, car, airplane, and other. The people in the urban cities are mainly depending on the public transport.
Urban transportation is more technologies related than the rural, as they have electric and CNG vehicles as well.
Thus, option C is correct.
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