Which of the following statements is true? If aggregate expenditures exceed real GDP, the economy will expand, causing production of goods and services to increase and unplanned inventories to rise. Once macroeconomic equilibrium has been established in an economy, there is no tendency for real GDP to change, even if there is a change in autonomous expenditure. A horizontal aggregate supply curve indicates that equilibrium real GDP is determined by aggregate supply. o If the actual unemployment rate is 8 percent, and the natural rate of unemployment is 6 percent, then the economy is producing a level of Real GDP that is less than the level of potential Real GDP