A Research Study Linked Different Genes for the Enzyme MAOA

A research study linked different genes for the enzyme MAOA to the probability of antisocial behavior.The effect of the gene varied from small to great,depending on what?

A) whether the person lived in a large or small town
B) ​whether the person lived alone or with others
C) ​whether the person was maltreated during childhood
D) whether the person's diet was high or low in fats and carbohydrates