Which of the following statements are true about this passage? A) When you really smile, the muscles around your eyes move 10 percent more than a fake one. B) Software can recognize people's facial expressions to determine whether people pretend to smile. C) The program can track and identify specific details around the eyes, cheeks and mouth. D) It's hard for the naked eye to tell whether people really laugh or pretend to laugh. E) Sometimes people smile because they are polite rather than happy.
