The long-run aggregate supply curve (LRAS) intersects the horizontal axis at:

The intersection of the long-run aggregate supply curve (LRAS) with the horizontal axis reflects the full-employment level of real GDP. This concept of full employment is vital in economics because it represents a state where all resources, particularly labor, are utilized efficiently without causing inflationary pressures. At this level, the economy is producing at its potential output, denoted by the maximum sustainable level of production that can occur without stimulating prices to rise.

In the long run, the aggregate supply does not vary with price levels, which emphasizes that the economy can only produce a specific amount of goods and services determined by its available resources and technology. Hence, the LRAS curve is vertical at this full-employment output level.

Other options touch on important concepts but do not accurately represent the point at which the LRAS intersects the horizontal axis. The natural rate of unemployment pertains to a level of unemployment that exists in a healthy economy but does not directly indicate the output level represented by the LRAS. Additionally, the maximum GDP is more of a theoretical construct that relates to aggregate demand and supply balance rather than a concrete intersection on the LRAS. Lastly, expected inflation rate relates to price levels and expectations but does not specifically determine the output level where LRAS intersects the horizontal