Which actions are performed by the SAP Web Dispatcher in this scenario?

You are using the SAP Web Dispatcher for load-balancing purposes .

Which actions are performed by the SAP Web Dispatcher in this scenario? Note: There are 2 correct answers to this question.
A . Authenticates the user’s credentials
B . Uses SAP logon groups to determine which requests are directed to which server
C . Checks current state of the message server
D . Decrypts the HTTPS request and then selects the server

Answer: B,C