The correct response to how the instances when expansionary fiscal policy should be used compare with those for contractionary fiscal policy is:
Expansionary fiscal policy should be used during recessions to help build the economy and contractionary fiscal policy should be used when there is high inflation.
This accurately reflects the purposes of these policies: expansionary fiscal policy is designed to stimulate economic activity, often during economic downturns, while contractionary fiscal policy is used to reduce inflation and cool down an overheated economy.