One of the most useful social conventions is money, whose universality across societies is matched only by language. Unlike language, which is rooted in an innate ability, money is an artificial, human invention. Hence, it seems occurred independently in more than one society.
What this question is testing
Your task
Find the assumption that, if added, guarantees the conclusion follows.
Common trap
Answers that only partly bridge the gap, leaving the conclusion unproven.
Winning move
Identify the new term in the conclusion and pick the choice that links it to the evidence.
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