Researchers have developed a membrane that quickly removes the oxygen from a refrigerator, thereby killing bacteria and enabling food to be stored almost indefinitely. Since food need not be kept as cold to prevent spoilage, energy costs will be greatly reduced. Thus, over the long run, oxygen-removing refrigerators will prove far less expensive than current models. The reasoning in the argument is most vulnerable to criticism on the grounds that it does not ['take into account the inconvenience caused by food spoilage in current refrigerators', 'take into account the effectiveness of current refrigerator technology in preventing food spoilage', 'explain the technology that enabled the oxygen-removing membrane to be developed', 'address the expense of building or refitting a refrigerator with the new technology']