Which of the following is an example of an informal communication channel?

Answer: Option C. A conversation with a coworker.
Explanation: Informal communication channels are less structured and more spontaneous than formal communication channels. A conversation with a coworker is an example of an informal communication channel because it is less structured and may not follow specific rules or procedures. A company-wide email, a meeting with your supervisor, and a press release are all examples of formal communication channels that are more structured and follow specific rules and procedures.