Jorge and Andreas Are Identical Twins

Multiple Choice

Jorge and Andreas are identical twins. At age 33, Jorge has acquired the mental disorder, schizophrenia. Andreas did not. How can this be since the twins are identical?

A) Biological factors interact with the environment.
B) Identical twins do not share all of their genes.
C) Cultural factors influence psychological factors.
D) This reflects the operation of dualism.
E) Andreas will become schizophrenic, but much later.