The meaning of the word "rejuvenate" in Paragraph 4 is close to ______.

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 fading hope
B．far from certain
C．just an illusion
D．only a matter of time