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 neither the film nor the camera was defective, and the customer handled the film correctly, then the store processed it improperly.
B: If pictures are taken with a defective camera, then it is not possible for the store to develop those pictures improperly.
C: If the customer's claim was not correct, then the store does not owe her a refund.
D: If the customer handled the film incorrectly, that is what caused the photographs that the store developed to be unsatisfactory.
Choose A, B, C or D as your solution.
A