You want to copy the master boot record, the partition table, and the 2 magic bytes at the beginning of /dev/had to a file so you can restore it later.
Which command accomplishes this?
A. dd if=/dev/hda of=mbr bs=512 count=1
B. dd if=mbr of=/dev/hda bs=512 count=1
C. dd of=/dev/zero if=/dev/hda bs=512 count=1
D. dd if=/dev/urandom of=/dev/hda bs=512 count=1
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