A
Professor Chan: The literature department' s undergraduate courses should cover only true literary works, and not such frivolous material as advertisements. Professor Wigmore: Advertisements might or might not be true literary works but they do have a powerfully detrimental effect on society -- largely because people cannot discern their real messages. The literature department' s courses give students the critical skills to analyze and understand texts. Ttherefore, it is the literature department' s responsibility to include the study of advertisements in its undergraduate courses. Which one of the following principles most strongly supports Professor Wigmore's argument?
A: The literature department's courses ought to enable students to analyze and understand any text that could have a harmful effect on society.
B: Advertisements ought to be framed in such a way that their real messages are immediately clear.
C: All undergraduate students ought to take at least one course that focuses on the development of critical skills.
D: Any text that is subtly constructed and capable of affecting people's thought and action ought to be considered a form of literature.