You have a portable computer that runs Windows 7. Windows Backup is configured to run every day at15:00. You need to prevent backups from automatically running when the computer is running on thebattery.  What should you do?（）

• A、From Backup and Restore， click Change settings.
• B、From Task Scheduler， modify the AutomaticBackup task.
• C、From Power Options， modify the settings of the current power plan.
• D、From the local computer policy， modify the power management settings.