Answer:
The correct answer is letter "A", "B", "C", and "D".
Explanation:
Direct response messaging aims to provide customers with a clear response to a claim or concern they have. First, the letter is replied with the same subject of the previous correspondence to demonstrate the case is being followed. Then, all relevant information is provided at the beginning of the letter. The questions or doubts of the customer must be answered in the order asked. If necessary, graphics can be used to help customers understand easier. Finally, the letter must have a forward-looking statement in the closing showing willingness to provide further help if needed.