Incident managers begin planning for the demobilization process when:

ARequested by the emergency operations center.
BIncident activities shift from response to recovery.
CThe first resources are ready to be released.
DThey begin the resource mobilization process.

Verified Answer :

Incident managers begin planning for the demobilization process when B. INCIDENT ACTIVITIES SHIFT FROM RESPONSE TO RECOVERY.

Demobilization occurs when the incident objectives have been met. 

Demobilization is the orderly, safe, and efficient return of all resources used in the incident to its original status and location. It must be done as soon as possible to facilitate accountability of the resources.