Technology has come a long way   14    the time of Thomas Edison, inventor of the electric light bulb, the electric motor andthe phonograph,    15     other things. Edison was also the main  16    for the first commercial central power system in NewYork City. Today, nearly a century after Edison’s most   17   period of invention, with the   18   of the Computer Age, manyof the functions that Edison brought to life    19    into   20   mobile communication devices.
14.
(A) before
(B) since
(C) because of
(D) with respect to