Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph. A. However, they have also brought problems and safety concerns. B. A major scooter manufacturer has started selling a speaker that will alert pedestrians and other road users of the scooter's presence. C. Many scooter riders disregard road regulations, ignore traffic lights and illegally ride on sidewalks. D. Electric scooters are all the rage in many cities across the world, helping people nimbly zip through traffic and effortlessly get about town.

1. BACD
2. BCAD
3. DACB
4. ABDC