7. Dr. Wang has been treating someone with an unusual combination of symptoms. He notes that there is no published research on such a combination of symptoms, and considers developing a case study. How would Dr. Wang conduct this study? (A) Try to find other cases like the one he is treating. (B) Gather detailed historical and biographical information on this single individual. (C) Examine treatment response using an open design. (D) Withhold treatment in an effort to fully understand the significance of symptoms.