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 ? "

Q with options: Give answer the following question using evidence from the above passage: What were they using to ride the trail ?
Select from: - A skateboard .; - A scooter .; - A bicycle .; - None of the above choices .;
A bicycle .