The word "evaporated" in Line 3 of Paragraph 1 is closest in meaning to ______.

A．technological advances have a negative impact on the innovativeness of human beings
B．our knowledge has brought about a new understanding of us human beings
C．without true innovations, all that we have achieved are not so useful to human beings
D．people used to think old things better than new ones before the period of 1750 - 1950

A．There have been no innovations at all in the fifty years since 1950.
B．Most scientific research is only continuation of the previous studies since 1950.
C．The advanced technologies are only small things that have not changed the way we think.
D．We actually haven' t made any progress in the past 50 years because of fewer innovations.