Step 1: Understanding the Question:
The question asks which port handled the highest container traffic among the options given, around the time this paper was published (2007).
Step 2: Key Fact or Approach:
A port's rank as "busiest" is decided by the volume of containers it handles each year, measured in twenty foot equivalent units (TEUs).
Step 3: Detailed Explanation:
Through the early and mid 2000s, the Port of Singapore held the top spot in the world for container throughput, thanks to its location on the main shipping route between Europe and East Asia and its status as a transhipment hub.
Rotterdam was the leading port in Europe but had already fallen behind the major Asian ports in total volume by this time.
Shanghai was growing fast and did go on to overtake Singapore, but that happened only after 2010, so it was not yet the busiest port when this paper was set.
Dubai runs one of the busiest ports in the Middle East, yet its container volume was still well below that of Singapore.
Step 4: Final Answer:
The busiest port in the world at that time was the Port of Singapore, so option (C) is correct.