Which cloud should be used to design an appropriate solution for CK’s users?

Cloud Kicks wants to create an external facing site where users can:

* Manage and submit cases via the web.

* Browse and search Knowledge Base articles.

* Contact Support via lice chat.

Which cloud should be used to design an appropriate solution for CK’s users?
A . Experience Cloud
B. Sales Cloud
C. Marketing Cloud
D. Service Cloud

Answer: D