The answer that fits the blank is this: ARE LARGELY RESPONSIBLE FOR THE SUCCESS OR FAILURE OF THEIR HELPING. Based on this body of research that talks above the characteristics of helpers, it clearly shows that each helper has their own personality on how they deal with their chores and based on their characteristics, this would be the determinant on how successful they are.
Since jeff is expelled from school for missing to many classes it seems like this is a behavioral problem. and i think he is seeing a behavioral Therapist.
