Answer:
D) there is a decline in the price level.
Step-by-step explanation:
Inflation refers to an increase in the general price level of a country, while deflation is exactly the opposite. Deflation represents a decrease in the general price level of a country. They are both calculated the same way, only that inflation is much more "famous" and notorious since it happens very oftenly, while deflation is very rare.
But that doesn't mean that deflation is good, since it generally represents an economic decline or recession. A low inflation rate is a sign of a healthy economy because it shows that the economy is growing.