Arrange the following steps in the process of achieving Full Employment Equilibrium in an economy: A) Aggregate demand increases due to external factors, B) The economy's output reaches its potential level, C) Short-run aggregate supply adjusts to meet changing demand, D) Long-run aggregate supply is established at this new equilibrium.

To achieve Full Employment Equilibrium in an economy, the process begins when aggregate demand increases due to external factors, such as increased consumer spending or government investment. This rise in demand leads to a higher demand for goods and services, prompting businesses to produce more. As they respond, short-run aggregate supply adjusts to meet this increased demand, allowing the economy to grow and output to rise. Eventually, when the economy’s output reaches its potential level, it stabilizes, and long-run aggregate supply is established at this new equilibrium. For example, if a new technology boosts consumer interest in products, businesses will ramp up production until the economy finds its balance at Full Employment.