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

为什么选E呢？一直没搞清楚逻辑关系，还望指点

为什么选E呢？一直没搞清楚逻辑关系，还望指点

谢谢

谢谢

老人的收入=孩子补贴+政府补助<=基本保障

E就是指，即使政府增加，收入也不会增长，因为孩子可能少给。