A. The password for the virtual machine opcuser or oracleuser can be changed through the Oracle Compute Cloud Service console

B. For the opcuser to become root on the WebLogic Administration Server virtual machine, the private key corresponding to the public key that was used when the service instance was created should first be attached to the virtual machine

C. The WebLogic Administrator user name and password should be used to disable or enable the load balancer through the Oracle Traffic Director Administration Console

D. The oracleuser cannot be used to log in to the WebLogic Administration Server virtual machine