Answer:
d. a rightward shift of an economy's long-run aggregate supply curve.
Explanation:
Aggregate supply in economics, is the total amount of goods and services that firms or organizations in a country are willing to sell at a particular price range over a specific period of time. Aggregate supply curve gives the relationship between price level and production of an economy.
Graphically, economic growth can be represented by a rightward shift of an economy's long-run aggregate supply curve.