Whenever an artist endowed with both a high level of artistic skill and a high degree of creativity combines these two abilities in the process of creating an artwork, the resulting product is a great work of art. Moreover, no work of art can be great unless execution. Thus, great works of art are necessarily rare.
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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