Which of the following would ensure no data is recovered from the system droves once they are disposed of?

During the decommissioning phase of a hardware project, a security administrator is tasked with ensuring no sensitive data is released inadvertently. All paper records are scheduled to be shredded in a crosscut shredded, and the waste will be burned. The system drives and removable media have been removed prior to e-cycling the hardware.

Which of the following would ensure no data is recovered from the system droves once they are disposed of?
A . Overwriting all HDD blocks with an alternating series of data.
B . Physically disabling the HDDs by removing the dive head.
C . Demagnetizing the hard drive using a degausser.
D . Deleting the UEFI boot loaders from each HD

Answer: C