The correct answer is C) Briefing.
When a command is transferred, the process should include a briefing.
A briefing is a meeting to inform about any situation. Is a short meeting to quickly inform in a succinct way about the state of the situation. It could be an in-person meeting or inform via written report.
In any situation, the Incident Commander is responsible for managing the on-scene incident, but the Operations Section Chief is the one who directs all responses and tactical actions to resolve the situation. So in this scenario, when a command is transferred, the process should include a briefing.