The best way of solving transportation problems in a cosmopolitan city is

Step 1: Analyze the question The question asks for the best way to solve transportation problems in a cosmopolitan city, meaning a large, busy city with a diverse and dense population (such as Lagos, Abuja or Port Harcourt). Such cities have heavy traffic, many commuters and many different transport needs.

Step 2: Explain the concept An integrated transport system combines different modes of transport (road, rail, water, and sometimes air) so that they work together as one network. Examples include:

• Bus Rapid Transit (BRT) linked to train services
• Ferries or water transport connected to bus terminals
• Shared ticketing and well-planned interchange points

This spreads passenger and freight load across several modes, reduces congestion on any single one, and gives commuters more choice.

Step 3: Evaluate each option

• A. Air transport system: Too expensive and unsuitable for short, daily commutes within a city. It serves long-distance travel, not urban movement.
• B. Feeder roads: These help connect rural or farming areas to main roads. They help access, but more roads alone do not solve congestion in a big city. They only solve part of the problem.
• C. Speed boats and ships: These work only where waterways exist, and they serve only a small share of commuters. This is not a general solution.
• D. Integrated transport system involving all modes: A comprehensive approach that tackles the problem from every side. This is the best option.

Step 4: Answer The correct answer is D. integrated transport system involving all modes.

Tip: In "best way" or "best solution" questions, look for the option that is comprehensive (words like "integrated," "all," "combined"). The other options usually address only one narrow part of the problem.