34.     

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.

为什么选A

政府冻结的是已经再使用的处方药的价格，而且处方药的用量没有增加，，但是平均的花费却上升了

注意：用量不等于价格

所以用量低不等于费用也低。

per amount*price=total expenditure

那只能price变一下了

怎么能使得price变呢？现在的处方药都被控制价格了，如果有新品的话，似乎就不再价格控制范围内了，A makes sense。

其他都不对