What is the best predeployment preventive action to take on a PC/laptop destined to receive Full Disk Encryption?

What is the best predeployment preventive action to take on a PC/laptop destined to receive Full
Disk Encryption?

A.
Leaving it on overnight

B.
Formatting the drive

C.
Nothing

D.
Running ChkDsk /F and defragmenting the drive

Explanation: