"Defied" in the 3rd paragraph probably means"______."

A．if not given close examination, ,technology could be used to destroy our world
B．technology is a human creation, so we are responsible for it
C．technology usually goes wrong, if not controlled by man
D．being a human creation, technology is liable to error

A．the computer has revolutionized the workings of the human mind
B．the computer can do the tasks that could only be done by people before
C．it has helped to switch to an information technology
D．it has a great potential impact on society