In our passage, Microsoft owner Bill Gates is the symbol of being ______.

A．most people use cable television
B．"community antenna" is another name for "regular antenna"
C．a community antenna is used for cable television
D．regular antennas cannot pick up TV signals programs

A．TV has begun to be used for educational purposes
B．there is no charge for CATV
C．cable TV cannot be used in mountainous areas
D．antennas for cable TV are usually put up in the center of a community