In which of the following situations would it NOT be appropriate to use a buffer?

A) The reader trusts the writer.
B) The reader is from a culture that believes it is okay to say "no".
C) The reader will not take "no" for an answer.
D) The reader will read the message with interest.

In situation C, where the reader will not take "no" for an answer, using a buffer might not be appropriate because it could potentially dilute the message or delay the inevitable negative response, which could frustrate a reader who is determined to get a different outcome. A buffer is typically used to soften the impact of what follows, but in this case, directness might be necessary to clearly communicate the refusal.