Final answer:
To help the support team at Universal Containers manage Cases along with other tasks, the administrator should add Cases as an available object to the existing queue and use assignment rules to set the queue as the owner of the new Cases.
Step-by-step explanation:
The correct options to help the support team at Universal Containers (UC) manage tasks and Cases would be:
c. Add Cases to the existing queue as an available object.
d. Use assignment rules to set the queue as the owner of the case.
An existing queue can be used by adding Cases as an available object to ensure that the team can manage them alongside other tasks. In addition, assignment rules can automate the process of assigning incoming Cases to the right queue, which in this scenario is the existing queue that is already used by the UC customer support team. This avoids the need to create a new queue, simplifying the management process and ensuring a more unified approach to handling tasks and Cases. Configuring a flow is another method to assign Cases, but isn't explicitly mentioned as the best solution in the context of the provided options.