An AIX server will not boot in normal mode and the server must be booted into maintenance mode to rebuild the boot logical volume. A NIM master is not defined in this environment. How is the system booted into maintenance mode to perform this task （）
A、Apply power and when the SMS menus appear press 5 repeatedly to enter a maintenance boot automatically. The system will present a maintenance shell eventually.

B、Boot media such as CDROM or Tape is required to boot into maintenance mode. When inserted into the proper device the system automatically boots into maintenance mode when it can not boot into normal mode.

C、Apply power and the server automatically boots into maintenance mode where you can select your disk to rebuild the boot logical volume.

D、Boot media such as CDROM or Tape is required and an administrator must select the proper SMS menus to get into maintenance mode.

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