Research into the Genetic and Neural Foundations of Empathy Have

Research into the genetic and neural foundations of empathy have found that

A) dizygotic twins show a higher correlation for the trait than do monozygotic twins.
B) monozygotic twins show a higher correlation for the trait than do dizygotic twins.
C) monozygotic and dizygotic twins show roughly equal co-relations for the trait.
D) correlations on measures of empathy in twins has been shown to be a result of environment, not biology.