【单选题】It is a little bit difficult for the couple to ge t by on such a small pension(养老金).
A.
How much longer we'll have enough energy to stay on here is anyone's guess.
B.
The next year we managed to get through the winter on only 100 gallons (相当于378.5升)of heating oil.
C.
The way to make self-sufficient work on a small scale is to resist the temptation to buy the expensive laborsaving devices.
D.
We made up the difference in income by cutting back without lowering our standard of living.