A．Health-care psychology.
B．Artificial intelligence.
C．Computer programming.
D．Industrial and organizational psychology.

A．They can't predict the time for the unstable economy and its severity.
B．They are lacking in historical review, reference and accumulation.
C．They have false assumptions about economic growth and development.
D．They can't predict the big swings or sudden changes in the job market.

A．By profiting from technology.
B．By seeking business solutions.
C．By improving technical farming.
D．By helping with the farm work.