Inflation is an economic condition in which prices for consumer goods increase, and the value of money or【51】power decreases. There are three important causes of inflation.
The first and most important cause may be【52】government spending. For example, in order to【53】a war or carry out social programs, the government may spend more money than it has received through taxes and other【54】, thus creating a【55】. In order to【56】it, the Treasury Department can simply【57】the money supply by【58】more paper money to meet the debts of government. This increase in the money supply will cause the value of the dollar to【59】decrease. The second cause of Inflation occurs when the money supply increases faster than the supply of【60】.
(51)

A. consuming
B. purchasing
C. expending
D. spending