In a Study That Assessed Genetic and Environmental Contributions to Individual

In a study that assessed genetic and environmental contributions to individual differences in physical and social aggression,researchers collected data on 6-year-old twins.What were the results of the research?

A) comparisons between monozygotic and dizygotic twins suggested that 50 to 60 percent of the variation in physical aggression could be explained by genetic factors,whereas 20 percent of social aggression was explained by genetics.
B) monozygotic twins consistently were found to be lower on social aggression than dizygotic twins.
C) twins are more likely to show antisocial behaviour than non-twins.
D) there is no significant relationship between genetics and aggression.