Metropolis' regulation limiting to four days the period during which m

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?

(A) Most consumers keep milk no more than three days after purchase.
(B) A recent survey showed that 20 percent of Metropolis consumers favored extending the current limitation on the sale of milk to 8 days.
(C) Metropolis' grocery-store owners would prefer small, frequent deliveries of milk to larger, infrequent deliveries.
(D) Milk kept longer than 14 days after pasteurization generally presents no medical dangers if consumed.
(E) In Metropolis, conditions for handling and storing milk after pasteurization are seldom close to optimum.