Which of these is a biased answer? (A) Carlos chooses 50 movies at random from a list of all his movies to determine the average runtime of the movies in his collection?
(B) Lisa asked 75 people at a neighborhood fast food restaurant about the last meal the ate, in order to find out the eating habits of people in her neighborhood.
(C) Members of a polling organization survey 800 registered voters by randomly choosing names from a list of all registered voters.
(D) A cable television company randomly calls 200 customers and asks them if they are satisfied with their service?