Final answer:
Economist Emily, who believes in the self-correcting nature of the economy, would expect the AS curve to shift right in the long run, self-adjusting the economy back to potential GDP after a leftward shift in AD.
Step-by-step explanation:
Emily, as an economist holding the self-correcting viewpoint, would assert that the appropriate response to a leftward shift in aggregate demand (AD) is for the government to remain passive. She believes that in the long run, the natural mechanisms of the economy will adjust to restore the economy to its full potential GDP. This adjustment likely means that, without government intervention, the aggregate supply (AS) curve would shift to the right, as resources, wages, and prices adjust over time, leading back to potential output. Hence, the correct answer to how Emily thinks the economy will respond in the long run to a leftward shift in aggregate demand is (d) AS will shift right.