A．The division of labor means that workers are general.
B．The division of labor means that workers are specialized.
C．The division of labor means that each worker is in charge of the whole operation.
D．The division of labor means each worker has to be an expert in one area.

A．The drug made them lose &he ability to work.
B．The drug made it more difficult for people to think rationally.
C．The drug stopped people from worrying about the future.
D．The drug enabled people to forget all their problems.