An administrator has implemented a solution to resolve a server’s problem in which the server unexpectedly reboots.  Which of the following should be the administrator’s NEXT troubleshooting step？（）

• A、Test the theory to determine if the solution will correct the issue， list all other possible causes.
• B、Verify full system functionality.
• C、Document the issue； include details regarding findings， actions taken to resolve the issue， and the outcome.
• D、Establish a theory of probable cause based on previous tests and determine next steps toresolve