Question: What should you do if you see a large truck slow down suddenly when driving along the road.
Options:
You should speed up, because truck drivers communicate with each other and alert others when police or road hazards are ahead.
You should also slow, because truck drivers communicate with each other and alert others when police or road hazards are ahead.  Follow their lead.
Answer: You should also slow, because truck drivers communicate with each other and alert others when police or road hazards are ahead.  Follow their lead.