What Do Researchers Mean When They Say That Child Maltreatment

What do researchers mean when they say that child maltreatment tends to be poly-victimization?

A) Maltreatment occurs in households where there are multiple mother figures.
B) Maltreatment occurs in households where there are multiple father figures.
C) Maltreated children tend to be victims of multiple forms of maltreatment simultaneously.
D) Maltreated children tend to be victims of one type of maltreatment.
E) Quite often, siblings are also maltreatment victims.