In Papousek's experiment babies make learned movements of the head in order to ______.

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．after the installation of a great number of cells and connections, robots will be capable of self-reproduction.
B．with the rapid development of technology, people have come to realize the possibility of making a machine with human-like ability.
C．once we make a machine as complex as the human brain, it will possess intelligence
D．robots will have control of the vast, man-made world in space.