A computer fails to boot into Windows XP and is displaying an ‘invalid boot disk’ error message on startup. Which of the following should the technician check FIRST?

A.
Rebuild the master boot record using FIXMBR from within the Windows Recovery Console.

B.
Replace the hard drive.

C.
Format the hard drive and reinstall Windows.

D.
Verify the hard drive is selected as a boot option in BIOS setup.