Prices of a genetically-engineered variety of wheat have recently gone down. Additionally, the agricultural market in general is experiencing a slump this season. Therefore, it would be wise for sellers to stock up on wheat while the prices are down, store it in refrigerated warehouses and sell it during the next season, thereby gaining considerably greater profits than they would if they were to sell the wheat this season.
Which of the following, if true, most seriously weakens the argument?
A.The larger the size of the refrigerated warehouse, the more expensive it is to maintain to prevent the spoilage of stored products.
B.The prices of some varieties of genetically-engineered crops have gone up this season despite the downturn in the agricultural market.
C.As genetic engineering becomes cheaper, prices of crops across the market are expected to decrease further.
D.Some varieties of wheat can be grown throughout the year, and the sale of such varieties does not depend on seasonal markets.
E.Sellers in the agricultural market have begun expanding their business into related markets such as the logging industry in order to compensate for the downturn