The correct answer is: 30 km/h.
The maximum speed of a special train with a 132 tonne bogie well wagon is 30 km/h. This is because the bogie well wagon is not designed to withstand speeds above 30 km/h. If the train were to travel at a speed above 30 km/h, the bogie well wagon could derail, which could cause a serious accident.
Option A is incorrect because the maximum speed of a special train with a 132 tonne bogie well wagon is 30 km/h, not 20 km/h.
Option B is incorrect because the maximum speed of a special train with a 132 tonne bogie well wagon is 30 km/h, not 25 km/h.
Option C is incorrect because the maximum speed of a special train with a 132 tonne bogie well wagon is 30 km/h, not 35 km/h.