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 shredder, 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 drives once they are disposed of? 

Answer options:

A. Overwriting all HDD blocks with an alternating series of data.
B. Physically disabling the HDDs by removing the drive head.
C. Demagnetizing the hard drive using a degausser.
D. Deleting the UEFI boot loaders from each HDD.

C