Complete the following statement to make it true. "In the AD-AS framework, the simple Keynesian model includes an aggregate supply curve that once the economy is producing at its Natural Real GDP." is vertical Under what condition will a decrease in total spending lead to an equivalent decrease in Real GO slopes upward When the economy is producing more than Natural Real GDP. is horizontal When the economy is producing at Natural Real GDP When the aggregate supply curve is vertical, O When the aggregate supply curve is horizontal