题目选项分析

Advertisement:

For sinus pain, three out of four hospitals give their patients Novex. So when you want the most effective painkiller for sinus pain, Novex is the one to choose.

Which of the following, if true, most seriously undermines the advertisement's argument?

【选项】Many drug manufacturers increase sales of their products to hospitals by selling these products to the hospitals at the lowest price the manu- facturers can afford