题目选项分析

Metropolis regulation limiting to four days the period during which milk can be sold to consumers after pasteurization is unreasonable. Under optimal conditions, pasteurized milk kept at 40 degrees Fahrenheit remains unspoiled for at least 14 days. If Metropolis current limitation were changed to eight days, milk prices would drop, but product quality would be unaffected. Which of the following, if true, would most seriously weaken the conclusion drawn above?

【选项】Most consumers keep milk no more than three days after purchase.