People who are not currently employed but say they want a job are counted as unemployed only if they

B

Explanation:

a. have previously held a job.

b. are actively seeking employment at least in the past 4 weeks.

c. are only willing to accept a reasonable offer.

d.are more than 21 years of age.

A person is unemployed if she does not have a job but is actively seeking employment

types of unemployment

structural unemployment is an unemployment that occurs as a result of changes in the economy. These changes can be as a result of changes in technology, polices or competition. Structural unemployment tends to be permanent.  

The geologist lost his hob permanently due to increase in wages (polices)

Frictional unemployment:  the period of time a person is unemployed from the period he leaves his current job and the time he gets another job. Eg. when a real estate agent who leaves a job in Texas and searches for a similar, higher-paying job in California.

Voluntary unemployment: e.g. worker at a fast-food restaurant who quits work and attends college.

answer; conceptual skills;