Which Statement Concerning the Role of Genetics in Determining Aggression

Which statement concerning the role of genetics in determining aggression is true?

A) Behavioral geneticists suggest that 90 percent of aggression can be accounted for by genetics.
B) The fact that males can only have a limited number of children contributes significantly to their evolutionary-based levels of aggression.
C) Children who inherit a predisposition toward aggression may evoke aggressive reactions from their parents.
D) Having parents and children who are both genetically predisposed toward aggression tends to result in a paradox effect,which results in little aggression by either child or parent.