According to the Text Discussion, Which of the Following Statements

According to the text discussion, which of the following statements about the role of genetics in schizophrenia is FALSE?

A) Family, twin, and adoption studies clearly indicate that genetic factors play a role in many cases of schizophrenia.
B) The more closely related a person is to someone who has schizophrenia, the greater the risk that he or she will eventually develop schizophrenia.
C) Evidence that points to a genetic cause of schizophrenia, such as the high concordance rate among identical twins, refutes the idea that environmental factors play a causal role.
D) If either of the biological parents of an adopted individual had schizophrenia, the adopted individual is at greater risk to develop schizophrenia.