Step 1: Understanding the Concept:
This is a weaken the argument question. The executive's argument consists of a conclusion and a piece of evidence.
Conclusion: Music publishers have been devastated by the photocopier.
Evidence: For a festival with 1,200 singers, the organizing committee bought only 12 copies of music.
Assumption: The executive assumes that the only reason for the low sales number (12) relative to the number of participants (1,200) is that the remaining copies were illegally photocopied. To weaken the argument, we must attack this assumption by providing a plausible alternative explanation for the low sales figure.
Step 2: Detailed Explanation:
We need to find an answer choice that explains why the committee might have bought only 12 copies, even if no photocopying took place.
Analyzing the Options:
(A) If only a third of the singers (400) performed the music, there is still a massive discrepancy between 400 singers and 12 copies sold. This does not seriously weaken the assumption that photocopying occurred.
(B) Having heard the music is irrelevant to needing the physical sheet music to perform it in a choir.
(C) This provides a compelling alternative explanation. If the committee's policy was to require singers to buy their own copies, then the committee itself would only need a few reference copies (e.g., for the conductor, accompanists, etc.). The 12 copies sold to the committee would not represent the total sales for the festival. Many more copies could have been sold directly to the 1,200 singers. This breaks the link between the evidence (12 copies sold to the committee) and the conclusion (devastation by photocopier), thus seriously weakening the argument.
(D) If each copy was shared by two singers, then 600 copies would be needed for 1,200 singers. The sale of only 12 copies would actually strengthen the executive's claim that massive photocopying must have occurred.
(E) This discusses a potential positive outcome after the festival, which is irrelevant to why so few copies were sold for the festival itself.
Step 3: Final Answer:
Option (C) provides the strongest alternative reason for the low number of sales to the organizing committee, thereby weakening the executive's claim that photocopying is the cause.