Which of the Following Sentences Is a True Statement About

Multiple Choice

Which of the following sentences is a true statement about twin studies conducted to examine the genetic contribution to prosocial behavior?

A) Fraternal twins and identical twins are equally similar to each other in levels of prosocial behavior, and their similarity decreases with age.
B) Fraternal twins and identical twins are equally similar to each other in levels of prosocial behavior, and their similarity increases with age.
C) Identical twins are more similar to each other in levels of prosocial behavior than are fraternal twins, and their similarity decreases with age.
D) Identical twins are more similar to each other in levels of prosocial behavior than are fraternal twins, and their similarity increases with age.