TOEFL Listening: ETS-TOEFL听力机经 - 5UN4MU5R4JEP0M8VP$

What is the professor's opinion toward models of human behavior traditionally used by economists? A. They are based on a flawed assumption about human nature B. They failed to take into account the human tendency to act in a self-interested way C. They should not have attempted to incorporate emotions D. they are likely to remain the most reliable tools available to economists