Due to the changes in the economy, the policy would be expansionary monteary policy.
The appropriate policies are reducing the reserve ratio and an open market purchase.
The benefits are increase in economic growth and reduction in unemployment.
The opportunity cost is increase in inflation.
Expansionary monetary policy are policies taken to increase the money supply in an economy. Expansionary monetary policy can be carried out by either reducing the reserve requirement or carrying out an open market purchase. A danger of expansionary monetary policy is it can increase inflation.