Which of the Following Will Cause Stagflation

Multiple Choice

Which of the following will cause stagflation?

A) An increase in the money supply (which shifts the economy's aggregate demand curve to the right) .
B) An increase in oil prices (which shifts the economy's aggregate supply curve to the left) .
C) A decrease in the money supply (which shifts the economy's aggregate demand curve to the right) .
D) Technical progress (which shifts the economy's aggregate supply curve to the right) .