prep破解1 cr34题

旗束奕缚

34.    (31982-!-item-!-188;#058&005681)

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.

请牛人给我讲讲题干，和为什么选A吧，都是什么意思啊

cannahere

我当时也做错了，不过排除法其实可以做出来
B:因为说的是per capita，因此人数上升的话，人均应下降---不能解释上升
C：说利润--无关（还没有价格直接呢）
D：用更便宜的，那应该下降--不能解释上升
E：外国停售，只能说明供给变化，不能说明需求变化--无关