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

why the key is E

"only by enough to provide them with a comfortable living"

That means if elderly parents' comfortable living conditions are below the comfortable line just to 200$,their children will supplement the income of 200$,meanwhile goverment increase the pension to 20%,thus the same parents' comfortable living condition require only 180$ to the the comfortable line,their children will supplement the income of 180$,not 200$.