Which of the following most logically completes the passage?

Concerned about financial well-being of its elderly citizens, the government of Runagia

decided two years ago to increase by 20 percent the government-provided pension

paid to all Runagians over 65. Inflation in the intervening period has been negligible,

and the increase has been duly received by all eligible Runagians. Nevertheless,

many of them are no better off financially than they were before the increase, in large

part because ________.

A. They rely entirely on the government pension for their income

B. Runagian banks are so inefficient that it can take up to three weeks to cash a

pension check

C. They buy goods whose prices tend to rise especially fast in times of inflation

D. The pension was increased when the number of elderly Runagians below the

poverty level reached an all-time high

E. In Runagia children typically supplement the income of elderly parents, but

only by enough to provide them with a comfortable living

看过以前关于此题的一些讨论,但都好象没太说清楚原因. 我的问题是(E)选项中关于"孩子的补助" 题目中并没有提到会减少, 那为什么老人的补助增加不会导致总的养老金的增加呢?