Answer:
A. skateboarders and rollerbladers
Explanation:
People sitting at a cafe are not in immediate danger.
People parking their vehicles are still in the vehicle, and are not considered pedestrians until they get out of the car.
Bicyclists ARE pedestrians, but emergency vehicles are not.
The 3rd article
(The executive is Article 4, and the judicial is Article 5)
Wagon train should be the answer :)