课本Test1 第二题 填空题 when the products of several competing supplies are perceived by consumers to be essentially the same.，classical economics predicts that price competition will reduce price to the same minimal levels and all supplies' profits to the minimal levels. Therefore.， if classical economics is true，and given supplies' desire to make as much profit as possible. it should be expected that-------- [D]when customers are unable to distinguish the products in a crowded market，customers will judge that the highest priced products are of higher quality 为什么是错的呀 D选项