一道有问题的pre逻辑题

为什么这样啊

Whichof the following most logically completes the passage?

Concernedabout the financial well-being of its elderly citizens, the government ofRunagia decided two years ago to increase by 20 percent the government-providedpension paid to all Runagians over 65. Inflation in the intervening period has been negligible, and theincrease has been duly received by all eligible Runagians.  Nevertheless, many of them are no better offfinancially 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 apension 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 thepoverty level reached an all-time high
E.in Runagia children typically supplement the income of elderly parents, butonly by enough to provide them with a comfortable living
这道题给的答案是E,可是我觉得应该选C啊~~
我认为E的答案不能解释为什么老人的生活没有提高，即使是children supplement，以前有现在有，钱多了肯定会比以前好一点吧~~
我是这么认为的，还是我对E选项有误会？？？？
请NN们给我解释下吧～～

为什么这样啊

怎么没有人理啊？

misslila

Inflation in the intervening period has been negligible