Question: A hard disk containing confidential data was damaged beyond repair. What should be done to the hard disk to prevent access to the data residing

A hard disk containing confidential data was damaged beyond repair. What should be done to the hard disk to prevent access to the data residing on it?
Demagnetize the hard disk.
Rewrite the hard disk with random 0s and 1s.
Physically destroy the hard disk.
Low-level format the hard disk.

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