Which of the Following Statements Is Correct

Which of the following statements is correct?

A) Frictional unemployment is the result of friction 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.
C) Cyclical unemployment is also called wait unemployment because this unemployment depends on the timing of the business cycle.
D) Search unemployment is the broadest unemployment category because it covers all other types of unemployment.