The power of videoconferencing lies in that it can ______.

A．even in 2030, obstacles still exist in reading and interpreting human thought
B．nowadays people feel angry with the domination of the history by elites
C．by the year 2050, human beings can lead an everlasting life biologically
D．people can only "live in" silicon to get an immortal life

A．a new invention in order to capture and preserve human thoughts
B．made by British scientists to offer a semblance of immortality
C．made of silicon circuits which can index people's nervous activity
D．a new machine on which radical research measures have already made