Marge Firmly Believes That Her Grandson Is Aggressive Toward Other

Marge firmly believes that her grandson is aggressive toward other children because his uncle who lives overseas was the same way,and his late grandfather was too.What does Marge most likely believe?

A) nature is more important than nurture in determining aggression.
B) nurture is more important than nature in determining aggression.
C) the environment is more important than genes in determining aggression.
D) both the environment and genes contribute to aggression.