销售专家普遍认为，在一个不再扩张的市场中，一个公司最佳的策略是追求较大的市场份额，要做到这一点的最佳方案是做一些能突出竞争对手产品缺陷的比较广告。在一个萧条的食物油市场内，大豆油和棕榈油的生产商进行了两年的比较广告战，相互指责对方产品对健康的有害影响。然而，这并没有能够使各自的市场份额增加，恰恰相反，越来越多的人不再从该市场购买任何食用油。以下哪项最可能是上述论证的一个结论？
A．在任何情况下，如果一个公司的产品比它的竞争对手的产品明显好的话，那么比较广告都能增加一个公司的市场份额。B．不应该在一个正在扩张或可能扩张的市场中使用比较广告。C．在任何情况下，比较广告都不应该作为一个报复手段来使用。D．比较广告冒着使它们的目标市场收缩的危险。E．比较广告不能产生长期收益，除非消费者能容易地判断那些声明的正确性。

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