A Study of 3000 Canadian Children Showed Which of the Following

A study of 3000 Canadian children showed which of the following regarding aggressive behaviour over time?

A) Children who were physically aggressive at a young age were more likely to be relationally aggressive by Grade 6.
B) Children who were relationally aggressive at a young age were more likely to be physically aggressive by Grade 6.
C) Most children who were physically aggressive were also relationally aggressive.
D) Children tended to be consistent with the type of aggression they displayed, either physical or relational, over the course of the study.