When Studying Extraversion in Monozygotic and Dizygotic Twins, Researchers Have

When studying extraversion in monozygotic and dizygotic twins, researchers have found that

A) monozygotic twins are more similar than dizygotic twins.
B) dizygotic twins are more similar than monozygotic twins.
C) there is no relationship in extraversion for either monozygotic or dizygotic twins.
D) if one monozygotic twin is high in extraversion, the other will generally be low (this relationship does not appear in dizygotic twins) .