Concept:Frictional unemployment is temporary unemployment that occurs while workers are moving between jobs or searching for new ones.
Explanation:It happens when a person has left one job and is still looking for another suitable job.
This period of job searching can be shortened if workers are able to move easily to places where jobs are available.
Removing barriers to labour mobility, such as housing problems, lack of transport, or poor job information, helps workers find new employment faster.
Retraining schemes are more useful for reducing structural unemployment, not frictional unemployment.
Restricting new technology or lowering wages would not reduce frictional unemployment in a proper way.
Answer:B. removing barriers to labour mobility