Using the Definition of Unemployment, Which of the Following Individuals

Using the definition of unemployment, which of the following individuals would be unemployed?

A) A full-time student quits school, enters the labor market for the first time, and searches for employment.
B) Because of a reduction in the military budget, your next door neighbor loses her job in a plant where nuclear warheads are made and must look for a new job.
C) Because of the increased level of automobile imports, an employee of General Motors is laid off but expects to be called back to work soon.
D) All of these individuals are unemployed.