The photographs that the store developed were quite unsatisfactory. The ... ...

The photographs that the store developed were quite unsatisfactory. The customer claims to have handled the film correctly. Neither the film nor the camera was defective. If a store does not process pictures properly, the customer is owed a refund, so if the customer’s claim is correct, the store owes her a refund. The argument relies on assuming which one of the following?
(A) If the store owes the customer a refund, then neither the camera nor the film was defective.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in June 2013 LSAT (PT69): Logical Reasoning A

 
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The photographs that the store developed were quite unsatisfactory. The ... ... 
Posted: 11/16/2013 23:03
Please explain why B is correct, my answer was A
Arcadia
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Posted: 11/17/2013 15:40
Jesse, the question asks for an assumption that is implied by the conclusion (store pays refund). A merely restates what is explicitly said in the problem statement. B on the other hand states the implicit assumption, ie, that the store improperly handles the film.