Answer:
C. In order to increase buying power, you need to earn a rate higher than the rate of inflation.
Explanation:
Price of different thing which we need, increases with inflation rate. Your buying power will be determined by netting your earning and expenditures of a specific period. If you are earning more than your spending then you have some savings and your buying power increases. On the other hand if your earning is less than your spending then your buying power decreases because you don't have savings.