I have questions regarding options of questions described in the CCSP Official practice test 2nd ed. c05.045.
My understanding is that ...
A. "Customer access provision" means an IAM, which activates or de-activates user-accounts in each tenant.
B. "Management system control interface" means a isolated "Control plane" from Data plane.
C. "Storage controller access" is needed to be isolated because customer data including sensitive are stored.
So, A,B,C is mandatory to be isolated.
But I'm really confused about option D describing "Customer production activities".
I think "Customer production activities" is customer's business activities such as login, transaction and etc...
Probably, it could also be isolated because of tenant for safety purpose.
What are "Customer production activities"? Why is "Customer production activities" not be isolated?