GCEGeographyTransport and Communication2024

Which of the following BEST explains why air transport has not significantly replaced sea transport for international bulk cargo movement?

AAircraft cannot carry the volume and weight of goods that ocean vessels can at comparable costCORRECT
BMost international airports lack the runway length required for fully laden cargo aircraft
CInternational aviation regulations restrict the types of goods that can be airfreighted
DSea transport routes are shorter than air routes between most major trading nations
AI
Toaster Teacher
Why the answer is A, and why the others tempt you.
The decisive advantage of sea transport for bulk cargo is its ability to carry enormous volumes and weights at a very low cost per tonne-kilometre. A single large container ship can carry tens of thousands of tonnes of cargo, which would require hundreds of cargo aircraft at prohibitively high cost. While regulations and infrastructure matter, the fundamental economic and capacity constraint is the primary reason air freight has not displaced shipping for bulk goods.
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