Which of the Following Is Implied by a Leftward Shift

Multiple Choice

Which of the following is implied by a leftward shift in the economy's AS curve?

A) There is an increase in aggregate supply.
B) There is a demand shock.
C) At any given price level,a lower level of output will be supplied.
D) At any given price level,a higher level of output will be supplied.
E) The same output will be produced in equilibrium,but at a lower price level.