Which is a correct statement?

a. Cyclical unemployment is also called wait unemployment because this unemployment depends on the timing of the business cycle

b. Structural unemployment is unemployment resulting from changes in the structure of consumer demand or technology

c. Search unemployment is the broadest unemployment category because it covers all other types of unemployment

d. Frictional unemployment is the result of frictions between labor and management over how best to perform work

b. Structural unemployment is unemployment resulting from changes in the structure of consumer demand or technology