What is the primary difference between short run aggregate supply (SRAS) and long run aggregate supply (LRAS)?

• A. SRAS is vertical, while LRAS is upward sloping.
• B. SRAS is determined by technology, while LRAS is determined by labor.
• C. SRAS is fixed, while LRAS can shift due to changes in resources.
• D. SRAS is affected by price levels, while LRAS is not.

Answer: (D)