Answer:
A,C,D
Step-by-step explanation:
Remember, we are told the issue concerns "support agents" working for a company–Universal Containers. Thus, they will be using Salesforce inorder to document their findings.
i. Case feed is one useful feature that quickly allows the support agents to edit, store and change the status of cases where necessary.
Ii. Case group is another useful feature to group cases that the support agents consider as been interrelated.
iii. Case comments feature allows them to read through case by case comment from the participants in the research, allowing proper insight into minds of the customers.