You Are Trying to Interpret the Data from a Twin

Multiple Choice

You are trying to interpret the data from a twin study on happiness that was recently published. The researchers measured self-reported happiness across various sets of twins who were either identical or fraternal, and either raised together or apart. If the results indicate that the identical twins raised together were actually not very similar on self-reported measures of happiness at all, what would this suggest?

A) variation in happiness is mostly attributable to factors other than genetics and environment, such as unique individual experiences
B) variation in happiness is mostly attributable to genetics
C) variation in happiness is mostly attributable to environment
D) variation in happiness is completely random and not something science can understand
E) None of these interpretations would make sense on the basis of that result