The writer seems to think that the teacher’s judgement on that sensitive piece of writing is ______

A．By making it work in such environments as deserts, oceans or space.
B．By working hard for 10 or 20 years.
C．By either properly programming it or changing its structure.
D．By reproducing it.

A．its intelligence and cost are beyond question
B．it is able to bear the rough environment
C．it is made as complex as the human brain
D．its architecture is different from that of the present ones