It is a matter of common observation that although incomes keep going up over the years,people never seem to become much better off! Prices are rising continuously.The condition is termed  one kind 0f inflation, the money supply is becoming inflated so that each unit of it becomes less valuable.People have got used in recent years to higher and higher rates of inflation. What could be bought ten years ago for one dollar now costs well over two dollars. It seems that this rate of inflation is tending to rise rather than to fall.If in the real world our money incomes go up at the same rate as prices,one might think that inflation does not matter.But it does when money is losing value,it lacks one of the qualities of a good money---stability   of value.It is no longer acceptable as a store of value;and it becomes an unsuitable standard of deferred  payments.Nobody wants to hold a wasting possession,so people try to get rid of money as quickly as possible. Inflation therefore stimulates people spending,and prevents people from saving. From the passage.we can know inflation    _   .
seldom happens is very common at present is a must has become less in recent years
Question: It is a matter of common observation that although incomes keep going up over the years,people never seem to become much better off! Prices are rising continuously.The condition is termed  one kind 0f inflation, the money supply is becoming inflated so that each unit of it becomes less valuable.People have got used in recent years to higher and higher rates of inflation. What could be bought ten years ago for one dollar now costs well over two dollars. It seems that this rate of inflation is tending to rise rather than to fall.If in the real world our money incomes go up at the same rate as prices,one might think that inflation does not matter.But it does when money is losing value,it lacks one of the qualities of a good money---stability   of value.It is no longer acceptable as a store of value;and it becomes an unsuitable standard of deferred  payments.Nobody wants to hold a wasting possession,so people try to get rid of money as quickly as possible. Inflation therefore stimulates people spending,and prevents people from saving. From the passage.we can know inflation    _   .
A. seldom happens
B. is very common at present
C. is a must
D. has become less in recent years
Answer: