Most business ethics courses and textbooks confine themselves to considering specific cases and principles. For example, students are often given lists of ethical rules for in-class discussion and role-playing. This approach fails to provide a framework for understanding specific principles and should thus be changed to include abstract ethical theory. Which one of the following, if valid, most helps to justify the reasoning above? ['Abstract ethical theory is the most appropriate of any context for understanding specific principles.', 'An ethics course should acquaint students with a wide range of specific principles and appropriate applications.', 'People have no obligation to always behave ethically unless they are acquainted with abstract ethical theory.', 'Courses that concentrate mainly on role- playing are undesirable because students must adopt alien personae.']