Final answer:
Incident managers begin planning for the demobilization process when the incident objectives and activities shift from response to recovery.
Step-by-step explanation:
The correct answer is 1) When incident objectives and activities shift from response to recovery. Incident managers begin planning for the demobilization process when the incident objectives and activities shift from response to recovery. In the incident management process, demobilization is the orderly and safe return of resources to their home jurisdictions or to other assignments. This typically occurs when the incident is under control and the response phase has transitioned to the recovery phase.