Biking one hundred miles in a day may sound impossible. It's the sort of stunt a crazy teenager would pull, right? In fact, thousands of middle aged and older adults complete century bike rides every year. What better way to show the world that you're not slowing down?

Who is most likely the audience of the document?

A. A crazy teenager
B. Experienced bicyclists
C. People who dislike exercise
D. Middle aged and older adults