The phrase "catch on" (Line 1, Para. 3) most probably means______.

A．People whose house has no space for wireless system.
B．People whose house cannot receive images, sounds or messages.
C．People who have no extra money to afford wireless system.
D．People who prefer to do things in a simpler way.

A．has mature technology to support it
B．has a stable early application—the X10 system
C．is to transmit data by power lines within the house
D．fostered products which affected wireless network