For data communications to occur, the communicating devices must be part of a communication system made up of a combination of?$?

For data communications to occur, the communicating devices must be pa

1.	For data communications to occur, the communicating devices must be part of a communication system made up of a combination of?$?
A.	WAN and LAN
B.	Hardware and software
C.	Full duplex and half duplex
D.	All of the above
Answer» C. Full duplex and half duplex