The short-run aggregate supply curve is upward sloping because the quantity supplied increases when the price rises. ... As a result, there is a positive correlation between the price level and output, which is shown on the short-run aggregate supply curve.
The short-run aggregate supply curve is upward-sloping because it takes some time for input prices and/or wages to adjust. ... When the aggregate demand curve shifts, there will be a short-run change in output, but no long-run shift in output. The price level will change in both the short run and the long run.
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.
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"A.Clear Skies" is the correct answer. This phrase is often used to imply that there should be no issue going forward with a certain task or event. It comes from the lingo of pilots and sailors.
An argument is sound if it is truthful and if it's valid. If all parts of it are valid and truthful, then the conclusion is also valid and truthful and therefore solid. That's why you should ask whether it is valid and true.
Brackets are used to indicate omissions.
Answer choice A is correct