I rode for what seemed like a long time , getting lost several times in the most confusing trail system you could imagine that would probably look like spaghetti from an aerial view . Eventually I saw some other people walking a dog into one of the trails I was on and I stopped to get my bearings . They asked me " When did they change the park rules ? "
According to the above context, choose the best option to answer the following question.
Question: What were they using to ride the trail ?
Options:
- A skateboard .
 - A scooter .
 - A bicycle .
 - None of the above choices .


A bicycle .