Consumer: If you buy a watch at a department store and use it only in the way it was intended to be used, but the watch stops working the next day, then the department store will refund your money. So by this very reasonable standard, Bingham's Jewelry Store should give me a the watch I bought from them stopped working the very next day.
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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