It would be B, amount,interest,and time. I hope this helps you!
Answer:
As the price level rises, firms expand their production because they can sell their output for more money.
Explanation:
As the price level rises, supply increases as firms expand production to increase profits. And as price level falls, supply falls as firm reduce production. For this reason the short-run aggregate supply curve slopes upward.
Please find attached a graph showing the short-run aggregate supply curve
Arvrage cost is the total cost divided by the number of units.