Concept:Money acts as a store of value only when it retains its purchasing power over time.
Explanation:A store of value lets people save wealth and spend it later without losing its worth.
When the general price level rises rapidly, inflation erodes the real value of money.
As prices climb, each unit of currency buys fewer goods and services than before.
Money saved earlier will then have less purchasing power in the future.
This makes money an unreliable store of value during rapid inflation.
A slow fall in prices, high unemployment, or a slow rise in prices do not wipe out money's ability to store value as severely.
Only a rapid, sustained increase in prices destroys the usefulness of money as a store of value.
Answer:C. prices of goods and services are rising rapidly