How should the consultant advise the organization?

A nonprofit organization is using Cases in Salesforce for case management with its clients. The nonprofit organization wants to relate Cases for the same client to each other .

How should the consultant advise the organization?
A . Use Case Comments and paste the URL of the first Case opened for the client in each new Case related to them.
B . Create a custom field for an ID number and assign the same number to all cases that need to be connected
C . Use Case Hierarchy to connect all Cases for the client to a parent case and click on View Hierarcht to see the connected Cases
D . Create a custom object that connects Cases to each other with two Case lookup fields and add a check box field to designate the parent Case.

Answer: C