Research conducted with identical twins who were raised together versus apart shows that _______
a. genes play a large role in determining body weight and shape.
b. when the twins are reared apart, weight gain occurs in different body areas.
c. twins raised together are more similar in body shape than those reared apart.
d. the weight of twins reared apart is correlated more with their adoptive family members than it is with their twin.
Answer: a
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