A communication channel a. is anything that interrupts the transmission of a message. b. includes only digital means for transmitting messages. c. is the medium over which the message travels. d. should be selected before idea formation.

c.

Explanation:

A communication channel refers to any method as to which a message is sent to its intended receiver, examples of different types of channels include written, spoken, electronic, or multimedia. Therefore in this scenario a communication channel is the medium over which the message travels. Which would be answer choice C.