Final answer:
The transportation system of a large city can be divided into passenger and freight transportation, public and private transportation, as well as surface and air transportation; the correct answer being all of the above.
Step-by-step explanation:
A large city's transportation system can be divided into several subsystems; two of which include:
- Passenger transportation and freight transportation.
- Public transportation and private transportation.
- Surface transportation and air transportation.
The correct answer is (D) All of the above. Each choice represents a valid way to segment the transportation system of a large city. They cater to different types of transportation users and modes, from individuals traveling for personal reasons and businesses moving goods, to distinctions between publicly accessed systems and private means of transport, as well as the different environments in which transportation can occur — on land or in the air.