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?
After price increases were prohibited, drug manufacturers concentrated on producing new medications to replace existing products.
The population of Voronia rose steadily throughout the period.
Improvements in manufacturing processes enabled drug manufacturers to maintain high profit levels on drugs despite the price freeze.
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.
After price increases were prohibited, some foreign manufacturers of expensive drugs ceased marketing them in Voronia.
排除吧,感觉正向选择有困难
A 开发新药,替代老药销售;新药可以不受价格限制的影响
B V的人口在这个时期内增加;不确定用药的人数,无法判断
C 药厂的利润高跟人均消费提高无关
D 为了实行限价,政府鼓励医生提供一种更便宜的药;那么人均消费应该下降
E 限价后,一些外国厂商停止了在V的新药推广;无关
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