What evidence illustrates that the need for affiliation has a genetic component??

a. ?Adoption studies show that siblings raised in different environments show similar patterns of social activity.
b. ?Our set point for needing affiliation correlates with cortical thickness.
c. ?People who are low in their need for affiliation are more likely to have genetic 5-HTTLPR polymorphism.
d. ?Twin studies show that set points for the need for affiliation are influenced by genetics.


ANSWER:
d

Psychology

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