Jordan Is a Developmental Psychologist Who Studies Bullying and Aggression

Jordan is a developmental psychologist who studies bullying and aggression in elementary school students. Her days often consist of spending time in the schoolyard with the children and making careful notes of their interactions. She pays particular attention to incidents of bullying in the schoolyard and is trying to find personality characteristics that are associated with bullying. In her most recent study, she found that being a bully is negatively correlated with academic performance at the 0.05 level of significance.
-Which of the following was the control group in Jordan's latest study

A) The students who were not aggressive.
B) The students who were aggressive.
C) The students who were aggressive, but had good grades.
D) There was no control group.