Listen to a talk about why people are often irrational. Based on what you hear, match the questions with the answers by placing a letter next to the number. 1.( ) According to the speaker, how can people behave in a rational way? 2.( ) What are the consequences of people’ s irrational behavior? 3.( ) What has MIT Professor Ariely discovered? 4.( ) What is the example in the talk regarding irrational behavior? 5.( ) What does the speaker say about this irrational behavior? A. People tend to behave irrationally in a predictable fashion. B. People should act according to logic and reason required in a situation. C. It causes problems to themselves as well as to others. D. He doesn’ t think this irrational behavior is always intentional. E. If a person knows someone suffers from a disease, he will feel he suffers from the same disease.