Final answer:
The BEST method for the technician to use in completely wiping the PC hard drive and destroying sensitive data is a low level format. FDISK, quick format, and standard format are not as secure in completely wiping the data.
Step-by-step explanation:
The BEST method for the technician to use in completely wiping the PC hard drive and destroying sensitive data is a low level format. A low level format completely erases all data on the hard drive by overwriting it with zeros. This method is more secure than other options such as quick format or standard format, as it removes all traces of the previously stored data.
FDISK is used for partitioning a hard drive and will not completely wipe the data on the disk. A quick format simply erases the file system and leaves the data intact, making it easy to recover. A standard format also does not securely erase the data, leaving some traces behind.