An administrator is working on a rack mount server with all newly installed equipment. Theuninterruptible power supply （UPS） in the rack starts beeping loudly. Which of the following is the FIRST troubleshooting step that should be taken？（）

• A、Ensure that the power cable for the UPS is plugged in.
• B、Ensure the battery in the UPS is still good.
• C、Check the smart cable connecting the UPS to the server.
• D、Reset the UPS to determine if the problem persists.