How does the detail about the study of twins contribute to the text ( Paragraph 22)?
O A It proves that environment has a significant impact on a person's happiness, as twins do not the same level of happiness after being
separated.
OB It shows that happiness is greatly determined by genetics, so evenseparated twins are likely to have the same level of happiness.
I C It shows how twins' happiness levels are affected when separated at birth.
OD It proves that there is no accurate way to determine what impacts a
person's level of happiness