Suppose That a Researcher Finds That Identical Twins Reared Together

Suppose that a researcher finds that identical twins reared together in the same home show differences with respect to intelligence.What do those differences indicate about the role of environmental and genetic factors in the development of that trait?

A) Environmental factors have more influence than genetic factors.
B) Genetic factors have more influence than environmental factors.
C) Both genetics and environmental factors contribute equally.
D) Genetic factors are solely responsible.