Answer:
D) encourage the use of multiple channels of communication.
Step-by-step explanation:
In order to be effective in communication, managers should be flexible enough to embrace all means of communication and choose the means of communication that is most suitable at a particular time.
The mode of communication chosen should enhance quick dissemination of information to the people the information is meant for.
To be effective, communication shouldn't be restricted to one mode of communication and all forms of communication should be enhanced.
Lateral communication is communication within a unit or division.
Downward communication is communication from a higher hierarchy in the organisation to a lower level.