Concept:A persistent fall in the general price level is called deflation.
Explanation:Deflation means that the average prices of goods and services continue to decrease over time.
It is the opposite of inflation, which is a persistent rise in the general price level.
Deflation may occur due to a decrease in aggregate demand, a reduction in the money supply, or lower production costs.
When prices fall, the purchasing power of money increases because each unit of currency can buy more goods.
Among the options, only deflation correctly describes a sustained fall in the general price level.
Devaluation is the deliberate reduction of a currency's value relative to foreign currencies, not a general price fall.
General price increase and inflation both refer to rising prices, so they are incorrect.
Answer:A. deflation