Final answer:
An e-mail message would be considered an effective medium for sending quick messages to colleagues, sharing important documents with clients, and conducting group discussions with multiple participants.
Step-by-step explanation:
An e-mail message would be considered an effective medium for the following situations:
- Sending a quick message to a colleague: E-mail is a convenient way to communicate short, time-sensitive messages to a colleague. It allows for quick back-and-forth communication without the need for a face-to-face meeting or a phone call.
- Sharing important documents with a client: E-mail provides a secure and efficient way to send important documents to a client. It ensures that the documents are delivered directly to the client's inbox, where they can easily access and review them.
- Conducting a group discussion with multiple participants: E-mail can be an effective medium for conducting group discussions with multiple participants. It allows for asynchronous communication, where participants can contribute to the discussion at their own convenience.