Which of the following is the BEST example of the use of chain of custody?

Which of the following is the BEST example of the use of chain of custody?

A.
Technician uses a third party to hand over the PC to the proper authority.

B.
Technician remembers when and who they gave the PC to.

C.
Technician calls supervisor after PC has been transferred.

D.
Technician notes the date, time and who was given the PC.