What are the benefits of this approach?

You are using SAP Commerce Cloud and you would like to use the GConnector.

What are the benefits of this approach? Note: There are 3 correct answers to this question.
A . Built-in mobile SDKs
B . Phone-number-based synchronization
C . Easy error logging and debugging
D . Session synchronization
E . Support for RaaS

Answer: C,D,E