单选题 For instance, in the 1950s, quiz shows were very popular in the U. S. and almost everyone watched them. Charles Van Doren, an English instructor, became rich and famous after winning money on several shows. He even had a career as a television personality. But one of the losers proved that Charles Van Doren was cheating. It turned out that the show's producers who were pulling the strings, gave the answers to the most popular contestants beforehand.
Charles Van Doren was proved to be innocent of cheating in the show.

• A. Right
• B. Wrong
• C. Not Mentioned