Professor Chan: The literature department's undergraduate courses should cover only true literary works, and not 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. Therefore, the study of advertisements in its undergraduate courses.
What this question is testing
Your task
Find the assumption the argument requires in order for its conclusion to hold.
Common trap
Answers that would help the argument but aren't strictly required (sufficient, not necessary).
Winning move
Negate each choice — the right one breaks the argument when negated.
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