Sofia Is Giving a Lecture in Which She Discusses Freud's

Sofia is giving a lecture in which she discusses Freud's sources of information for his theory of personality. She is most likely to argue that Freud's ____.

A) experiments were very carefully and tediously conducted
B) experiments were not tightly controlled
C) case studies reflected a biased sample of individuals
D) use of naturalistic observation reflected an over-reliance on that method