68. If the economy is in short-run equilibrium, what is the expected short-run impact of an increase in consumer optimism?

A. Aggregate demand increases, increasing the price level and increasing real output.

B. Aggregate demand increases, decreasing the price level and increasing real output.

C. Aggregate demand increases, increasing the price level and decreasing real output.

D. Short-run aggregate supply increases, decreasing the price level and increasing real output