For several years, per capita expenditure on prescription drugs in Voronia rose by fifteen percent or more annually. In order to curb these dramatic increases, the ministry of health prohibited drug manufacturers from raising any of their products' prices. Even though use of prescription drugs did not expand after this price freeze, per capita expenditure for prescription drugs continued to increase by a substantial percentage each year.
Which of the following, if true, most helps to explain why the ministry's action did not achieve its goal?
(A) After price increases were prohibited, drug manufacturers concentrated on producing new medications to replace existing products.
(B) The population of Voronia rose steadily throughout the period.
(C) Improvements in manufacturing processes enabled drug manufacturers to maintain high profit levels on drugs despite the price freeze.
(D) In addition to imposing a price freeze, the government encouraged doctors to prescribe generic versions of common drugs instead of the more expensive brand-name versions.
(E) After price increases were prohibited, some foreign manufacturers of expensive drugs ceased marketing them in Voronia.
问题分析：A说限价后，生产商就用新的代替老的，就是说我就不用老的了，有点能解释原文的意思，留着。
B 说人口增加了，没说，干掉。
C说即便限价了，生产商的利润还是会很高，主要围绕利润谈的，文章没有说过，干掉。
D说除了限价，政府还鼓励医生开普通药不是开更贵的要，医生开的药物价格高低和病患是否会花钱买这两者没关系，无法影响到原文对处方药的花费多少问题，无关选项，干掉。
E说自从限制价格后，外国生产商停止在这个地方做市场了，很扯的一个选项，干掉。
