Select which of the following options is a description consistent with the graph (note that the jump may be from A to A' or from A' to A)

Select one: an increase in public spending in a period in which the economy is in the long run equilibrium a tax reduction in a period of economic activity above the long run a tax increase in a period in which the economy is in the long run equilibrium an increase in public spending in a period in which the economy is above the long run equilibrium