Answer: A.) INFLATION
Explanation: prices of goods and services are usually prone to change and fluctuation from time to time. The change usually associated with inflation is an increase in price of commodities within a certain period of time. In other to adequately measure inflation, the change in prices of certain economic commodities are compared over an equal time interval either monthly, quarterly or yearly basis as the case may be.
It is calculated as the ratio of the difference between the price of goods between the base and current period to the price at the base period expressed as a percentage. Fall or decline in prices of goods and services is usually called deflation
