When will an escort be required for a vehicle carrying an exceptional load?

1. AWhen the vehicle carries dangerous materials (hazardous materials).
2. BWhen the vehicle has been authorised to carry a heavy load.
3. CWhen the width of the exceptional load is more than 3.00 metres and its length is more than 20.00 metres.
4. DWhen the width of its load is more than 3.40 metres.

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