Which of the Following Statements Is True

Multiple Choice

Which of the following statements is true?

A) The aggregate demand-aggregate supply model attempts to explain the equilibrium level of real GDP and the price level.
B) The aggregate demand-aggregate supply model gives us inflation and the various levels of real GDP.
C) The inflation-unemployment cycle attempts to explain the equilibrium level of real GDP.
D) The inflation-unemployment cycle is based on movements up and down the Phillips curve.