A and D are the correct responses

A. Create a case validation rule to ensure cases are owned by a user when closed.
Use a validation rule (e.g., block IsClosed = TRUE when the Owner is a Queue) so agents can’t close a case that’s still queue-owned. This is the right control to prevent bad data going forward.

D. Use a data tool to update the owner field on closed cases.
Fix the existing backlog in bulk by updating OwnerId (via Data Loader / mass update). Salesforce supports bulk owner updates; you can also mass-update cases from list views.

Correct: A, B
Option A: Create a case validation rule to ensure cases are owned by a user when closed

By creating a case validation rule, you can enforce a rule that ensures cases must be owned by a user when they are closed. This will prevent cases from being closed while still assigned to a queue, improving the accuracy of agent performance reports.

Option B: Create a process builder and flow to change the owner on closed cases

Using a process builder and flow, you can automate the process of changing the owner of closed cases from a queue to a specific user. This solution ensures that all closed cases are properly reassigned to an individual agent, ensuring accurate agent performance reporting.