What does "the gem of late 20th century technology" refer to

A．both develop from the most advanced science of their time
B．they are operated similarly in technical terms
C．both help to change the way we do business and communicate
D．both facilitate the communication between cultures and ethnic groups

A．the development of global telegraph network
B．the popularity of the Internet
C．the breakup of provincialism
D．the well connected radio and TV system