Which of the Following Is a Free Rider

Which of the following is a free rider?

A) Butch breeds the feared pit bulls, and his neighbors now erect fences around their property.
B) Fred watches many public television programs, but he has never sent in a contribution.
C) Barry steals candy from the store where he works.
D) Betty regularly uses the local public library.
E) Joe drives 20,000 miles a year on public streets, but he pays no more in taxes than Sam, who only drives 1,000 miles.