Researchers Predicted That the Parents of Children Who "Act Out

Researchers predicted that the parents of children who "act out" at school would see a decrease in that behaviour if they themselves were to take problem-solving skills training.In this example, what were the researchers hypothesizing about parental problem-solving skills and children's acting-out behaviours?

A) that they are weakly correlated
B) that they are positively correlated
C) that they are strongly correlated
D) that they are negatively correlated