Cheryl Wants to Know Why One Member of an Identical

Multiple Choice

Cheryl wants to know why one member of an identical twin pair develops schizophrenia whereas his twin does not.Her professor replies that,"Researchers aren't sure." Which of the following is most likely according to our textbook?

A) The professor is demonstrating that sometimes we must tolerate uncertainty.
B) The professor is being evasive because he doesn't accept the current theory.
C) The professor does not know how to respond because the theories on this topic change so quickly.
D) The professor needs time to consider various interpretations of the research.