Answer:
b. an increase in the capital stock, but not an increase in the price level.
Step-by-step explanation:
In order to understand both short-run economic fluctuations and how the economy movement from short to long run, we need the aggregate supply and aggregate demand model.
An increase in the capital stock, but not an increase in the price level would shift the long-run aggregate supply curve right.
The long-run aggregate supply curve would shift rightward when immigration from foreign countries rises or technology improves.
When the price level rises, the wealth effect and the interest-rate effect provide incentives for consumers to spend less. The price level of goods and services in an economy influences the exchange rate, imports and exports