Rice,Thapar,and Colleagues (2007,2009)attempted to Uncouple the Effects of Genetics and the Effects

Rice,Thapar,and colleagues (2007,2009) attempted to uncouple the effects of genetics and the effects of smoking while pregnant on birth weight and elevated antisocial behavior.They found that

A) birth weight was unrelated to smoking.
B) antisocial behaviors elevated the risk for smoking.
C) antisocial behavior could be linked to genes but not to smoking.
D) genetic factors appear to cause smoking.