Answer:
a. promote good relations
b. formally confirm follow-up procedures
c. establish a record of the incident
Explanation:
If we follow up with the bad news in written form so it is important for promoting the goods relations with the clients or customers, confirming the follow-up procedures with respect to clients or customers, plus it also develops the record of the incident but it does not important to achieve for all of the purposes
Therefore the correct option is a, b and c but not d
