Incomplete question. The full question read;
It is best to use an oral channel in the following situations except when ___
Answer:
Explanation:
Remember, using oral feedback helps your listeners to easily understand the complexities in your message when it is simplified by the speaker, receiving immediate feedback from the audience, and encourages interaction among the audience.
However, using an oral channel does not guarantee an honest no permanent record would occur, thus, it is an exception among the listed situations.