If the Variation in Some Characteristic Depends to a Large

If the variation in some characteristic depends to a large degree on genes, then we should expect to find that

A) dizygotic twins resemble each other more closely than monozygotic twins do.
B) monozygotic twins and dizygotic twins resemble each other equally closely.
C) monozygotic twins who are separated at birth and reared in separate environments resemble each other.
D) adopted children resemble their adoptive parents but not their biological parents.