(B) The wholesale price of raw sugar is typically higher than that of the same volume of raw corn
This is a minor restatement of the information given in the argument.
(C) The operating costs of the average retail candy store have remained constant during the last, year
Irrelevant. We are not concerned with the operating costs of the candy store.
(D) Changes in retail prices always lag behind changes in wholesale prices
Strengthens the argument.
(E) The cost of harvesting raw corn has increased in the last year
Irrelevant since the wholesale price of raw corn has fallen.
(A) The cost of processing raw corn for candy has increased during the last year
Correct Answer. Although prices of raw corn may have fallen, the cost of specific raw corn for candy has increased. So it is possible that the price of corn syrup sweetened candy may not fall.
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