请教OG-30题

30. The price the government pays for standard weapons purchased from military contractors is determined by a
pricing method called “historical costing.” Historical costing allows contractors to protect their profits by adding a
percentage increase, based on the current rate of inflation, to the previous year’s contractual price.
Which of the following statements, if true, is the best basis for a criticism of historical costing as an economically
sound pricing method for military contracts?
A. The government might continue to pay for past inefficient use of funds.
B. The rate of inflation has varied considerably over the past twenty years.
C. The contractual price will be greatly affected by the cost of materials used for the products.
D. Many taxpayers question the amount of money the government spends on military contracts.
E. The pricing method based on historical costing might not encourage the development of innovative
weapons.

不理解答案为什么选A，请大家多多指教。谢谢！

A 如果第一年定价过高，那么以后这种屋企的价格就不经济

B 通胀变就变，反正都是价格的组成部分，有什么关系？

C 同上理

D 纳税人问就问了，排除

E 人家问经济性，来个创新科技干什么？