Final answer:
The correct answer is 'Consoling someone on the loss of a loved one' because it is an expression of sympathy, not a rejection or refusal like the other options.
Step-by-step explanation:
The question asks which of the following is not a type of bad news message: a) Refusing a request for a favour, b) Declining an invitation, c) Consoling someone on the loss of a loved one, or d) Refusing a request for credit. The correct answer is c) Consoling someone on the loss of a loved one. This does not constitute a bad news message in the context of business or professional communication, as it is an expression of sympathy and support rather than a denial or refusal of a request. In contrast, the other options all involve a form of rejection and can be categorized as bad news messages.