An IT manager is concerned about server administrators having to be cross-trained to work on every server. Which of the following is the BEST way to correct this problem?（）

• A、Ensure that server baselines are documented for each server.
• B、Ensure that all server documentation is completed and up to date.
• C、Ensure that each server is accessible via a KVM over IP.
• D、Ensure that each server is processed through the change control board.