Which of the following should the technician do to maintain chain of custody?

An incident response technician collected a mobile device during an investigation.

Which of the following should the technician do to maintain chain of custody?
A . Document the collection and require a sign-off when possession changes.
B . Lock the device in a safe or other secure location to prevent theft or alteration.
C . Place the device in a Faraday cage to prevent corruption of the data.
D . Record the collection in a blockchain-protected public ledger.

Answer: A