After POST, the error message ‘Invalid system disk. Replace and press any key’ appears. Which of the following is MOST likely the cause?()
A、There is a non-bootable CD in the CD-ROM drive.
B、There is a non-bootable DVD in the DVD-ROM drive.
C、There is a non-bootable Blu-Ray in the Blu-Ray drive.
D、There is a non-bootable floppy in the floppy drive.