What is not appropriate to include in a letter of complaint? a. details about the purchase price, model, and serial number b. details about why you were dissatisfied with the product or service c. a proposed solution to the issue d. threats notifying the recipient of action you will take if not satisfied

The correct answer is D. Threats notifying the recipient of action you will take if not satisfied

Explanation:

A letter of complaint is a type of formal communication used by customers to complain or report an issue with a service or product and ask for a solution or compensation for it. Because of this, it is common letters of complaint provide details related to the product or service the customer is complaining, along with the details of it such as the price or serial numbers and besides this the customer can include suggestions about possible solutions to the issue. However, a letter of complaint should never include threads, not only because this is a formal communication tool, but because the purpose of it is to find a suitable solution for both sides and by threatening the company or person that sold the product or service the customer would just create more issues and probably would not be helped. Therefore the action that is not appropriate in a letter of complaint is " Threats notifying the recipient of action you will take if not satisfied".

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