Mary and Celine Are Identical Twins Who Have Been Raised

Multiple Choice

Mary and Celine are identical twins who have been raised apart in separate adoptive homes.Mary has developed a psychological disorder,but Celine does not appear to have the same disorder.What does this evidence suggest

A)  Environmental factors have more influence than genetic factors in this disorder. 
B)  Both genetic and environmental factors contribute equally to this disorder. 
C)  Genetic factors do not influence this disorder. 
D)  Genetic factors have more influence than environmental factors in this disorder.