What are the implications of a vertical long run aggregate supply curve in the ADAS model?

• A. It shows that aggregate demand has no impact on the economy.
• B. It suggests that output is fixed at potential GDP, and price level changes do not affect output.
• C. It indicates that both output and price level are flexible in the long run.
• D. It implies that output can increase indefinitely without causing inflation.

Answer: (B)