If due to a breakdown you cannot reach the minimum speed on a dual carriageway and there is a risk of being rear-ended by other vehicles, you must...
A)travel only as far as the next exit, always on the hard shoulder.
B)compulsorily stop the vehicle on the hard shoulder.
C)travel with the hazard lights on.Correct
Any driver who, due to an emergency, is forced to travel on a motorway or dual carriageway at an abnormally reduced speed must leave at the first exit.
If travelling at an abnormally reduced speed that seriously disrupts traffic, you must travel on the right-hand hard shoulder, if it is sufficient, with the hazard lights on. (The vehicle's maximum authorised mass must not exceed 3,500 kg).