John should make sure he trains the workers better, including how to fix the machine.
During verbal (speech) communication, multiple channels can be used simultaneously. The correct answer, therefore, is D.
<h3>What are the channels of broadcast?</h3>
Verbal Communication can be broadcast via various channels. They include:
- Television
- Radio
- Internet Video Broadcast
- Podcast etc.
When a speech is being given, any or all of the channels above can be used to communicate such a speech simultaneously. We see this especially with presidential speeches and or sports events.
Learn more about Speech Communication in the link below:
brainly.com/question/14289341
I could be wrong but I think it is A
That means to choose a topic based on the information that was in the unit.
