What would the consultant recommend to expedite the handling of these cases?

At Universal Containers, a support agent dedicated to one customer regularly handles complex integration-related cases. In these cases, the agent collaborates with Universal Containers product development team and the client’s system integration.

What would the consultant recommend to expedite the handling of these cases?
A . Build a repository of Knowledge articles related to integration and share it with the customer.
B . Enable Chatter case feed and add product development team members to the case team.
C . Create a related child case and assign the child case to the product development team.
D . Create a private Chatter group with customers and invite key individuals to join the group.

Answer: D