William Kell,one of Rogers's Students,conducted a Research to Predict the Behavior

William Kell,one of Rogers's students,conducted a research to predict the behavior of delinquent children and found that:

A) family environment was the best predictor of later behavior.
B) self-insight was the best predictor of later behavior.
C) genetic factors were more influential than environmental factors.
D) it is impossible to predict later behavior.