Final answer:
Factor C in the ABCX model refers to the psychosocial resources of the family, including social support networks, coping strategies, and available resources.
Step-by-step explanation:
In the ABCX model, the factor that refers to the psychosocial resources of the family is Factor C. Factors A and B in the ABCX model refer to the stressor or crisis event and the family's existing resources and strengths, respectively. Factor X represents the perception and interpretation of the event by the family. Factor C, the psychosocial resources of the family, includes the social support networks, coping strategies, and available resources that can help the family in dealing with the event or crisis.