GMAT&LSAT CR_Test D_7

yanjiachen

7.     The postal service is badly mismanaged. Forty years ago, first-class letter delivery cost only three cents. Since then, the price has increased nearly tenfold, with an actual decrease in the speed and reliability of service.

Each of the following statements, if true, would tend to weaken the argument above EXCEPT:

(A) The volume of mail handled by the postal service has increased dramatically over the last forty years.

(B) Unprecedented increases in the cost of fuel for trucks and planes have put severe upward pressures on postal delivery costs.

(C) Private delivery services usually charge more than does the postal service for comparable delivery charges.

(D) The average delivery time for a first-class letter four decades ago was actually slightly longer than it is today.（E）

(E) The average level of consumer prices overall has increased more than 300 percent over the last forty years.

Why the right answer is E instead of C?

eaglegrace

此题为因果型结论：因为种种现象，邮政系统管理不善。
A其他原因导致该结果
B其他原因导致该结果
C间接说明其他原因导致该结果
D显示因果关系的资料不准确
E增加原因资料，加强选项