What Do Studies of Monozygatic (MZ) and Dizygotic (DZ) Twins

Multiple Choice

What do studies of monozygatic (MZ) and dizygotic (DZ) twins indicate?

A) There is a significantly higher risk for suicidal behavior among MZ twin pairs than among DZ twin pairs.
B) MZ twin pairs who suffer child abuse are more likely to engage in antisocial activity than DZ twin pairs.
C) If one member of a twin pair was delinquent, so was the other, and the effect was greater for MZ twin pairs.
D) Studies indicate all these findings.