Columnist: George Orwell' s book 1984 has exercised much influence on a great number of this newspaper' s readers. One thousand readers were surveyed and asked to name the one book that had the most influence on their lives. The book chosen most often was the Bible; 1984 was second. The answer to which one of the following questions would most help in evaluating the columnist's argument? ['How many books had each person surveyed read?', 'How many people chose books other than 1984?', "How many people read the columnist's newspaper?", 'How many of those surveyed had actually read the books they chose?']